// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

module blink.mojom;

// ============ Definition for WebFeature used for UseCounter ===============
//
// Do not change assigned numbers of existing items: add new features
// to the end of the list.
//
// A WebFeature conceptually represents some particular web-exposed API
// or code path which can be used/triggered by a web page.
// TODO(rbyers): Add CSS and animated CSS feature types by making this a
// more sophisticated class.
enum WebFeature {
  kOBSOLETE_PageDestruction = 0,
  kWorkerStart = 4,
  kSharedWorkerStart = 5,
  kOpenWebDatabase = 10,
  kUnprefixedRequestAnimationFrame = 13,
  kPrefixedRequestAnimationFrame = 14,
  kContentSecurityPolicy = 15,
  kContentSecurityPolicyReportOnly = 16,
  kPrefixedTransitionEndEvent = 18,
  kUnprefixedTransitionEndEvent = 19,
  kPrefixedAndUnprefixedTransitionEndEvent = 20,
  kAutoFocusAttribute = 21,
  kDataListElement = 23,
  kFormAttribute = 24,
  kIncrementalAttribute = 25,
  kInputTypeColor = 26,
  kInputTypeDate = 27,
  kInputTypeDateTimeFallback = 29,
  kInputTypeDateTimeLocal = 30,
  kInputTypeEmail = 31,
  kInputTypeMonth = 32,
  kInputTypeNumber = 33,
  kInputTypeRange = 34,
  kInputTypeSearch = 35,
  kInputTypeTel = 36,
  kInputTypeTime = 37,
  kInputTypeURL = 38,
  kInputTypeWeek = 39,
  kInputTypeWeekFallback = 40,
  kListAttribute = 41,
  kMaxAttribute = 42,
  kMinAttribute = 43,
  kPatternAttribute = 44,
  kPlaceholderAttribute = 45,
  kPrefixedDirectoryAttribute = 47,
  kRequiredAttribute = 49,
  kStepAttribute = 51,
  kPageVisits = 52,
  kHTMLMarqueeElement = 53,
  kReflection = 55,
  kPrefixedStorageInfo = 57,
  kDeprecatedFlexboxWebContent = 61,
  kDeprecatedFlexboxChrome = 62,
  kDeprecatedFlexboxChromeExtension = 63,
  kWindowEvent = 69,
  kContentSecurityPolicyWithBaseElement = 70,
  kDocumentClear = 74,
  kXMLDocument = 77,
  kXSLProcessingInstruction = 78,
  kXSLTProcessor = 79,
  kSVGSwitchElement = 80,
  kDocumentAll = 83,
  kFormElement = 84,
  kDemotedFormElement = 85,
  kSVGAnimationElement = 90,
  kLineClamp = 96,
  kSubFrameBeforeUnloadRegistered = 97,
  kSubFrameBeforeUnloadFired = 98,
  kDocumentCreateAttribute = 111,
  kDocumentCreateAttributeNS = 112,
  kDocumentXMLEncoding = 115,    // Removed from DOM4.
  kDocumentXMLStandalone = 116,  // Removed from DOM4.
  kDocumentXMLVersion = 117,     // Removed from DOM4.
  kNavigatorProductSub = 123,
  kNavigatorVendor = 124,
  kNavigatorVendorSub = 125,
  kPrefixedAnimationEndEvent = 128,
  kUnprefixedAnimationEndEvent = 129,
  kPrefixedAndUnprefixedAnimationEndEvent = 130,
  kPrefixedAnimationStartEvent = 131,
  kUnprefixedAnimationStartEvent = 132,
  kPrefixedAndUnprefixedAnimationStartEvent = 133,
  kPrefixedAnimationIterationEvent = 134,
  kUnprefixedAnimationIterationEvent = 135,
  kPrefixedAndUnprefixedAnimationIterationEvent = 136,
  kEventReturnValue = 137,  // Legacy IE extension.
  kSVGSVGElement = 138,
  kDOMSubtreeModifiedEvent = 143,
  kDOMNodeInsertedEvent = 144,
  kDOMNodeRemovedEvent = 145,
  kDOMNodeRemovedFromDocumentEvent = 146,
  kDOMNodeInsertedIntoDocumentEvent = 147,
  kDOMCharacterDataModifiedEvent = 148,
  kPrefixedAudioDecodedByteCount = 164,
  kPrefixedVideoDecodedByteCount = 165,
  kPrefixedVideoSupportsFullscreen = 166,
  kPrefixedVideoDisplayingFullscreen = 167,
  kPrefixedVideoEnterFullscreen = 168,
  kPrefixedVideoExitFullscreen = 169,
  kPrefixedVideoEnterFullScreen = 170,
  kPrefixedVideoExitFullScreen = 171,
  kPrefixedVideoDecodedFrameCount = 172,
  kPrefixedVideoDroppedFrameCount = 173,
  kPrefixedElementRequestFullscreen = 176,
  kPrefixedElementRequestFullScreen = 177,
  kBarPropLocationbar = 178,
  kBarPropMenubar = 179,
  kBarPropPersonalbar = 180,
  kBarPropScrollbars = 181,
  kBarPropStatusbar = 182,
  kBarPropToolbar = 183,
  kInputTypeEmailMultiple = 184,
  kInputTypeEmailMaxLength = 185,
  kInputTypeEmailMultipleMaxLength = 186,
  kInputTypeText = 190,
  kInputTypeTextMaxLength = 191,
  kInputTypePassword = 192,
  kInputTypePasswordMaxLength = 193,
  kPrefixedPageVisibility = 196,
  kDocumentBeforeUnloadRegistered = 200,
  kDocumentBeforeUnloadFired = 201,
  kDocumentUnloadRegistered = 202,
  kDocumentUnloadFired = 203,
  kSVGLocatableNearestViewportElement = 204,
  kSVGLocatableFarthestViewportElement = 205,
  kSVGPointMatrixTransform = 209,
  kDOMFocusInOutEvent = 211,
  kFileGetLastModifiedDate = 212,
  kHTMLElementInnerText = 213,
  kHTMLElementOuterText = 214,
  kReplaceDocumentViaJavaScriptURL = 215,
  kElementPrefixedMatchesSelector = 217,
  kCSSStyleSheetRules = 219,
  kCSSStyleSheetAddRule = 220,
  kCSSStyleSheetRemoveRule = 221,
  // The above items are available in M33 branch.

  kInitMessageEvent = 222,
  kPrefixedDevicePixelRatioMediaFeature = 233,
  kPrefixedMaxDevicePixelRatioMediaFeature = 234,
  kPrefixedMinDevicePixelRatioMediaFeature = 235,
  kPrefixedTransform3dMediaFeature = 237,
  kPrefixedStorageQuota = 240,
  kResetReferrerPolicy = 243,
  // Case-insensitivity dropped from specification.
  kCaseInsensitiveAttrSelectorMatch = 244,
  kFormNameAccessForImageElement = 246,
  kFormNameAccessForPastNamesMap = 247,
  kFormAssociationByParser = 248,
  kSVGSVGElementInDocument = 250,
  kSVGDocumentRootElement = 251,
  kWorkerSubjectToCSP = 257,
  kWorkerAllowedByChildBlockedByScript = 258,
  kDeprecatedWebKitGradient = 260,
  kDeprecatedWebKitLinearGradient = 261,
  kDeprecatedWebKitRepeatingLinearGradient = 262,
  kDeprecatedWebKitRadialGradient = 263,
  kDeprecatedWebKitRepeatingRadialGradient = 264,
  // The above items are available in M34 branch.

  kTextAutosizing = 274,
  kHTMLAnchorElementPingAttribute = 276,
  kSVGClassName = 279,
  kHTMLMediaElementSeekToFragmentStart = 281,
  kHTMLMediaElementPauseAtFragmentEnd = 282,
  kPrefixedWindowURL = 283,
  kWindowOrientation = 285,
  kDocumentCaptureEvents = 287,
  kDocumentReleaseEvents = 288,
  kWindowCaptureEvents = 289,
  kWindowReleaseEvents = 290,
  kDocumentXPathCreateExpression = 295,
  kDocumentXPathCreateNSResolver = 296,
  kDocumentXPathEvaluate = 297,
  kAnimationConstructorKeyframeListEffectObjectTiming = 300,
  kAnimationConstructorKeyframeListEffectNoTiming = 302,
  kPrefixedCancelAnimationFrame = 304,
  kNamedNodeMapGetNamedItem = 306,
  kNamedNodeMapSetNamedItem = 307,
  kNamedNodeMapRemoveNamedItem = 308,
  kNamedNodeMapItem = 309,
  kNamedNodeMapGetNamedItemNS = 310,
  kNamedNodeMapSetNamedItemNS = 311,
  kNamedNodeMapRemoveNamedItemNS = 312,
  kPrefixedDocumentIsFullscreen = 318,
  kPrefixedDocumentCurrentFullScreenElement = 320,
  kPrefixedDocumentCancelFullScreen = 321,
  kPrefixedDocumentFullscreenEnabled = 322,
  kPrefixedDocumentFullscreenElement = 323,
  kPrefixedDocumentExitFullscreen = 324,
  // The above items are available in M35 branch.

  kSVGForeignObjectElement = 325,
  kSelectionSetPosition = 327,
  kAnimationFinishEvent = 328,
  kSVGSVGElementInXMLDocument = 329,
  kEventSrcElement = 343,
  kEventCancelBubble = 344,
  kEventPath = 345,
  kNodeIteratorDetach = 347,
  kEventGetReturnValueTrue = 350,
  kEventGetReturnValueFalse = 351,
  kEventSetReturnValueTrue = 352,
  kEventSetReturnValueFalse = 353,
  kWindowOffscreenBuffering = 356,
  kWindowDefaultStatus = 357,
  kWindowDefaultstatus = 358,
  kPrefixedTransitionEventConstructor = 361,
  kPrefixedMutationObserverConstructor = 362,
  kNotificationPermission = 371,
  kRangeDetach = 372,
  kPrefixedFileRelativePath = 386,
  kDocumentCaretRangeFromPoint = 387,
  kElementScrollIntoViewIfNeeded = 389,
  kRangeExpand = 393,
  kHTMLImageElementX = 396,
  kHTMLImageElementY = 397,
  kSelectionBaseNode = 400,
  kSelectionBaseOffset = 401,
  kSelectionExtentNode = 402,
  kSelectionExtentOffset = 403,
  kSelectionType = 404,
  kSelectionModify = 405,
  kSelectionSetBaseAndExtent = 406,
  kSelectionEmpty = 407,
  kVTTCue = 409,
  kVTTCueRender = 410,
  kVTTCueRenderVertical = 411,
  kVTTCueRenderSnapToLinesFalse = 412,
  kVTTCueRenderLineNotAuto = 413,
  kVTTCueRenderPositionNot50 = 414,
  kVTTCueRenderSizeNot100 = 415,
  kVTTCueRenderAlignNotCenter = 416,
  // The above items are available in M36 branch.

  kElementRequestPointerLock = 417,
  kVTTCueRenderRtl = 418,
  kPostMessageFromSecureToInsecure = 419,
  kPostMessageFromInsecureToSecure = 420,
  kDocumentExitPointerLock = 421,
  kDocumentPointerLockElement = 422,
  kPrefixedCursorZoomIn = 424,
  kPrefixedCursorZoomOut = 425,
  kTextEncoderConstructor = 429,
  kTextEncoderEncode = 430,
  kTextDecoderConstructor = 431,
  kTextDecoderDecode = 432,
  kFocusInOutEvent = 433,
  kMouseEventMovementX = 434,
  kMouseEventMovementY = 435,
  kDocumentFonts = 440,
  kMixedContentFormsSubmitted = 441,
  kFormsSubmitted = 442,
  kHTMLImports = 455,
  kElementCreateShadowRoot = 456,
  kDocumentRegisterElement = 457,
  kEditingAppleInterchangeNewline = 458,
  kEditingAppleConvertedSpace = 459,
  kEditingApplePasteAsQuotation = 460,
  kEditingAppleStyleSpanClass = 461,
  kHTMLImportsAsyncAttribute = 463,
  kXMLHttpRequestSynchronous = 465,
  kCSSSelectorPseudoUnresolved = 466,
  kCSSSelectorPseudoShadow = 467,
  kCSSSelectorPseudoContent = 468,
  kCSSSelectorPseudoHost = 469,
  kCSSSelectorPseudoHostContext = 470,
  kCSSDeepCombinator = 471,
  // The above items are available in M37 branch.

  kUseAsm = 473,
  kDOMWindowOpen = 475,
  kDOMWindowOpenFeatures = 476,
  kAspectRatioFlexItem = 479,
  kDetailsElement = 480,
  kDialogElement = 481,
  kMapElement = 482,
  kMeterElement = 483,
  kProgressElement = 484,
  kWheelEventWheelDeltaX = 491,
  kWheelEventWheelDeltaY = 492,
  kWheelEventWheelDelta = 493,
  kSendBeacon = 494,
  kSendBeaconQuotaExceeded = 495,
  kSVGSMILElementInDocument = 501,
  kMouseEventOffsetX = 502,
  kMouseEventOffsetY = 503,
  kMouseEventX = 504,
  kMouseEventY = 505,
  kMouseEventFromElement = 506,
  kMouseEventToElement = 507,
  kRequestFileSystem = 508,
  kRequestFileSystemWorker = 509,
  kRequestFileSystemSyncWorker = 510,
  kSVGStyleElementTitle = 519,
  kPictureSourceSrc = 520,
  // The above items are available in M38 branch.

  kPicture = 521,
  kSizes = 522,
  kSrcsetXDescriptor = 523,
  kSrcsetWDescriptor = 524,
  kSelectionContainsNode = 525,
  kXMLExternalResourceLoad = 529,
  kMixedContentPrivateHostnameInPublicHostname = 530,
  kLegacyProtocolEmbeddedAsSubresource = 531,
  kRequestedSubresourceWithEmbeddedCredentials = 532,
  kNotificationCreated = 533,
  kNotificationClosed = 534,
  kNotificationPermissionRequested = 535,
  kSRIElementWithMatchingIntegrityAttribute = 540,
  kSRIElementWithNonMatchingIntegrityAttribute = 541,
  kSRIElementWithUnparsableIntegrityAttribute = 542,
  kV8Animation_StartTime_AttributeGetter = 545,
  kV8Animation_StartTime_AttributeSetter = 546,
  kV8Animation_CurrentTime_AttributeGetter = 547,
  kV8Animation_CurrentTime_AttributeSetter = 548,
  kV8Animation_PlaybackRate_AttributeGetter = 549,
  kV8Animation_PlaybackRate_AttributeSetter = 550,
  kV8Animation_PlayState_AttributeGetter = 551,
  kV8Animation_Finish_Method = 552,
  kV8Animation_Play_Method = 553,
  kV8Animation_Pause_Method = 554,
  kV8Animation_Reverse_Method = 555,
  // The above items are available in M39 branch.

  kBreakIterator = 556,
  kScreenOrientationAngle = 557,
  kScreenOrientationType = 558,
  kScreenOrientationLock = 559,
  kScreenOrientationUnlock = 560,
  kGeolocationSecureOrigin = 561,
  kGeolocationInsecureOrigin = 562,
  kNotificationSecureOrigin = 563,
  kNotificationInsecureOrigin = 564,
  kNotificationShowEvent = 565,
  kSVGTransformListConsolidate = 569,
  kSVGAnimatedTransformListBaseVal = 570,
  kQuotedAnimationName = 571,
  kQuotedKeyframesRule = 572,
  kSrcsetDroppedCandidate = 573,
  kWindowPostMessage = 574,
  kRenderRuby = 576,
  kScriptElementWithInvalidTypeHasSrc = 578,
  kXMLHttpRequestSynchronousInNonWorkerOutsideBeforeUnload = 581,
  kCSSSelectorPseudoScrollbar = 582,
  kCSSSelectorPseudoScrollbarButton = 583,
  kCSSSelectorPseudoScrollbarThumb = 584,
  kCSSSelectorPseudoScrollbarTrack = 585,
  kCSSSelectorPseudoScrollbarTrackPiece = 586,
  kLangAttribute = 587,
  kLangAttributeOnHTML = 588,
  kLangAttributeOnBody = 589,
  kLangAttributeDoesNotMatchToUILocale = 590,
  kInputTypeSubmit = 591,
  kInputTypeSubmitWithValue = 592,
  // The above items are available in M40 branch.

  kSetReferrerPolicy = 593,
  kTextWholeText = 599,
  kNotificationCloseEvent = 603,
  kStyleMedia = 606,
  kStyleMediaType = 607,
  kStyleMediaMatchMedium = 608,
  kMixedContentPresent = 609,
  kMixedContentBlockable = 610,
  kMixedContentAudio = 611,
  kMixedContentDownload = 612,
  kMixedContentFavicon = 613,
  kMixedContentImage = 614,
  kMixedContentInternal = 615,
  kMixedContentPlugin = 616,
  kMixedContentPrefetch = 617,
  kMixedContentVideo = 618,
  kCSSSelectorPseudoFullScreenAncestor = 628,
  kCSSSelectorPseudoFullScreen = 629,
  kWebKitCSSMatrix = 630,
  kAudioContextCreateAnalyser = 631,
  kAudioContextCreateBiquadFilter = 632,
  kAudioContextCreateBufferSource = 633,
  kAudioContextCreateChannelMerger = 634,
  kAudioContextCreateChannelSplitter = 635,
  kAudioContextCreateConvolver = 636,
  kAudioContextCreateDelay = 637,
  kAudioContextCreateDynamicsCompressor = 638,
  kAudioContextCreateGain = 639,
  kAudioContextCreateMediaElementSource = 640,
  kAudioContextCreateMediaStreamDestination = 641,
  kAudioContextCreateMediaStreamSource = 642,
  kAudioContextCreateOscillator = 643,
  kAudioContextCreatePeriodicWave = 645,
  kAudioContextCreateScriptProcessor = 646,
  kAudioContextCreateStereoPanner = 647,
  kAudioContextCreateWaveShaper = 648,
  kAudioContextDecodeAudioData = 649,
  kAudioContextResume = 650,
  kAudioContextSuspend = 651,
  kMixedContentInNonHTTPSFrameThatRestrictsMixedContent = 661,
  kMixedContentInSecureFrameThatDoesNotRestrictMixedContent = 662,
  kMixedContentWebSocket = 663,
  kSyntheticKeyframesInCompositedCSSAnimation = 664,
  kMixedContentFormPresent = 665,
  kGetUserMediaInsecureOrigin = 666,
  kGetUserMediaSecureOrigin = 667,
  // The above items are available in M41 branch.

  kDeviceMotionInsecureOrigin = 668,
  kDeviceMotionSecureOrigin = 669,
  kDeviceOrientationInsecureOrigin = 670,
  kDeviceOrientationSecureOrigin = 671,
  kSandboxViaIFrame = 672,
  kSandboxViaCSP = 673,
  kBlockedSniffingImageToScript = 674,
  kFetch = 675,
  kFetchBodyStream = 676,
  kXMLHttpRequestAsynchronous = 677,
  kWhiteSpacePreFromXMLSpace = 679,
  kWhiteSpaceNowrapFromXMLSpace = 680,
  kSVGSVGElementForceRedraw = 685,
  kSVGSVGElementSuspendRedraw = 686,
  kSVGSVGElementUnsuspendRedraw = 687,
  kSVGSVGElementUnsuspendRedrawAll = 688,
  kAudioContextClose = 689,
  kCSSZoomNotEqualToOne = 691,
  // The above items are available in M42 branch.

  kClientRectListItem = 694,
  kWindowClientInformation = 695,
  kWindowFind = 696,
  kWindowScreenLeft = 697,
  kWindowScreenTop = 698,
  kV8Animation_Cancel_Method = 699,
  kV8Animation_Onfinish_AttributeGetter = 700,
  kV8Animation_Onfinish_AttributeSetter = 701,
  kV8Window_WebKitAnimationEvent_ConstructorGetter = 707,
  kCryptoGetRandomValues = 710,
  kSubtleCryptoEncrypt = 711,
  kSubtleCryptoDecrypt = 712,
  kSubtleCryptoSign = 713,
  kSubtleCryptoVerify = 714,
  kSubtleCryptoDigest = 715,
  kSubtleCryptoGenerateKey = 716,
  kSubtleCryptoImportKey = 717,
  kSubtleCryptoExportKey = 718,
  kSubtleCryptoDeriveBits = 719,
  kSubtleCryptoDeriveKey = 720,
  kSubtleCryptoWrapKey = 721,
  kSubtleCryptoUnwrapKey = 722,
  kCryptoAlgorithmAesCbc = 723,
  kCryptoAlgorithmHmac = 724,
  kCryptoAlgorithmRsaSsaPkcs1v1_5 = 725,
  kCryptoAlgorithmSha1 = 726,
  kCryptoAlgorithmSha256 = 727,
  kCryptoAlgorithmSha384 = 728,
  kCryptoAlgorithmSha512 = 729,
  kCryptoAlgorithmAesGcm = 730,
  kCryptoAlgorithmRsaOaep = 731,
  kCryptoAlgorithmAesCtr = 732,
  kCryptoAlgorithmAesKw = 733,
  kCryptoAlgorithmRsaPss = 734,
  kCryptoAlgorithmEcdsa = 735,
  kCryptoAlgorithmEcdh = 736,
  kCryptoAlgorithmHkdf = 737,
  kCryptoAlgorithmPbkdf2 = 738,
  kDocumentSetDomain = 739,
  kUpgradeInsecureRequestsEnabled = 740,
  kUpgradeInsecureRequestsUpgradedRequest = 741,
  kDocumentDesignMode = 742,
  kGlobalCacheStorage = 743,
  kNetInfo = 744,
  kBackgroundSync = 745,
  kLegacyConst = 748,
  kV8Permissions_Query_Method = 750,
  // The above items are available in M43 branch.

  kSVGHrefBaseVal = 758,
  kSVGHrefAnimVal = 759,
  kV8CSSRuleList_Item_Method = 760,
  kV8MediaList_Item_Method = 761,
  kV8StyleSheetList_Item_Method = 762,
  kStyleSheetListAnonymousNamedGetter = 763,
  kAutocapitalizeAttribute = 764,
  kFullscreenSecureOrigin = 765,
  kFullscreenInsecureOrigin = 766,
  kDialogInSandboxedContext = 767,
  kSVGSMILAnimationInImageRegardlessOfCache = 768,
  kEncryptedMediaSecureOrigin = 770,
  kPerformanceFrameTiming = 772,
  kV8Element_Animate_Method = 773,
  // The above items are available in M44 branch.

  kV8SVGSVGElement_GetElementById_Method = 778,
  kV8MessageChannel_Constructor = 780,
  kV8MessagePort_PostMessage_Method = 781,
  kV8MessagePort_Start_Method = 782,
  kV8MessagePort_Close_Method = 783,
  kMessagePortsTransferred = 784,
  kCSSKeyframesRuleAnonymousIndexedGetter = 785,
  kV8Screen_AvailLeft_AttributeGetter = 786,
  kV8Screen_AvailTop_AttributeGetter = 787,
  kV8SVGFEConvolveMatrixElement_PreserveAlpha_AttributeGetter = 791,
  kV8SVGStyleElement_Disabled_AttributeGetter = 798,
  kV8SVGStyleElement_Disabled_AttributeSetter = 799,
  kInputTypeFileSecureOrigin = 801,
  kInputTypeFileInsecureOrigin = 802,
  kElementAttachShadow = 804,
  kV8SecurityPolicyViolationEvent_DocumentURI_AttributeGetter = 806,
  kV8SecurityPolicyViolationEvent_BlockedURI_AttributeGetter = 807,
  kV8SecurityPolicyViolationEvent_StatusCode_AttributeGetter = 808,
  kHTMLLinkElementDisabled = 809,
  kV8HTMLLinkElement_Disabled_AttributeGetter = 810,
  kV8HTMLLinkElement_Disabled_AttributeSetter = 811,
  kV8HTMLStyleElement_Disabled_AttributeGetter = 812,
  kV8HTMLStyleElement_Disabled_AttributeSetter = 813,
  kV8DOMError_Constructor = 816,
  kV8DOMError_Name_AttributeGetter = 817,
  kV8DOMError_Message_AttributeGetter = 818,
  kTextInputFired = 830,
  kV8TextEvent_Data_AttributeGetter = 831,
  kV8TextEvent_InitTextEvent_Method = 832,
  kClientHintsDPR = 835,
  kClientHintsResourceWidth = 836,
  kClientHintsViewportWidth = 837,
  kSRIElementIntegrityAttributeButIneligible = 838,
  kFormDataAppendNull = 843,
  kNonHTMLElementSetAttributeNodeFromHTMLDocumentNameNotLowercase = 845,
  kNavigatorVibrate = 850,
  kNavigatorVibrateSubFrame = 851,
  kV8XPathEvaluator_Constructor = 853,
  kV8XPathEvaluator_CreateExpression_Method = 854,
  kV8XPathEvaluator_CreateNSResolver_Method = 855,
  kV8XPathEvaluator_Evaluate_Method = 856,
  kRequestMIDIAccess_ObscuredByFootprinting = 857,
  kV8MouseEvent_LayerX_AttributeGetter = 858,
  kV8MouseEvent_LayerY_AttributeGetter = 859,
  kInnerTextWithShadowTree = 860,
  kSelectionToStringWithShadowTree = 861,
  kWindowFindWithShadowTree = 862,
  kV8CompositionEvent_InitCompositionEvent_Method = 863,
  kV8CustomEvent_InitCustomEvent_Method = 864,
  kV8DeviceMotionEvent_InitDeviceMotionEvent_Method = 865,
  kV8DeviceOrientationEvent_InitDeviceOrientationEvent_Method = 866,
  kV8Event_InitEvent_Method = 867,
  kV8KeyboardEvent_InitKeyboardEvent_Method = 868,
  kV8MouseEvent_InitMouseEvent_Method = 869,
  kV8MutationEvent_InitMutationEvent_Method = 870,
  kV8StorageEvent_InitStorageEvent_Method = 871,
  kV8UIEvent_InitUIEvent_Method = 873,
  kRequestFileSystemNonWebbyOrigin = 876,
  kV8MemoryInfo_TotalJSHeapSize_AttributeGetter = 879,
  kV8MemoryInfo_UsedJSHeapSize_AttributeGetter = 880,
  kV8MemoryInfo_JSHeapSizeLimit_AttributeGetter = 881,
  kV8Performance_Timing_AttributeGetter = 882,
  kV8Performance_Navigation_AttributeGetter = 883,
  kV8Performance_Memory_AttributeGetter = 884,
  kV8SharedWorker_WorkerStart_AttributeGetter = 885,
  // The above items are available in M45 branch.

  kHTMLMediaElementPreloadNone = 892,
  kHTMLMediaElementPreloadMetadata = 893,
  kHTMLMediaElementPreloadAuto = 894,
  kHTMLMediaElementPreloadDefault = 895,
  kMixedContentBlockableAllowed = 896,
  kPseudoBeforeAfterForInputElement = 897,
  kV8Permissions_Revoke_Method = 898,
  kLinkRelDnsPrefetch = 899,
  kLinkRelPreconnect = 900,
  kLinkRelPreload = 901,
  kLinkHeaderDnsPrefetch = 902,
  kLinkHeaderPreconnect = 903,
  kClientHintsMetaAcceptCH = 904,
  kHTMLElementDeprecatedWidth = 905,
  kClientHintsContentDPR = 906,
  kElementAttachShadowOpen = 907,
  kElementAttachShadowClosed = 908,
  kAudioParamSetValueAtTime = 909,
  kAudioParamLinearRampToValueAtTime = 910,
  kAudioParamExponentialRampToValueAtTime = 911,
  kAudioParamSetTargetAtTime = 912,
  kAudioParamSetValueCurveAtTime = 913,
  kAudioParamCancelScheduledValues = 914,
  kV8Permissions_Request_Method = 915,
  kLinkRelPrefetch = 917,
  kLinkRelPrerender = 918,
  kLinkRelNext = 919,
  kCSSValuePrefixedMinContent = 921,
  kCSSValuePrefixedMaxContent = 922,
  kCSSValuePrefixedFitContent = 923,
  kCSSValuePrefixedFillAvailable = 924,
  kPresentationDefaultRequest = 926,
  kPresentationAvailabilityChangeEventListener = 927,
  kPresentationRequestConstructor = 928,
  kPresentationRequestStart = 929,
  kPresentationRequestReconnect = 930,
  kPresentationRequestGetAvailability = 931,
  kPresentationRequestConnectionAvailableEventListener = 932,
  kPresentationConnectionTerminate = 933,
  kPresentationConnectionSend = 934,
  kPresentationConnectionMessageEventListener = 936,
  kCSSAnimationsStackedNeutralKeyframe = 937,
  kReadingCheckedInClickHandler = 938,
  kFlexboxIntrinsicSizeAlgorithmIsDifferent = 939,
  // The above items are available in M46 branch.

  kHTMLImportsHasStyleSheets = 940,
  kNetInfoType = 946,
  kNetInfoDownlinkMax = 947,
  kNetInfoOnChange = 948,
  kNetInfoOnTypeChange = 949,
  kV8Window_Alert_Method = 950,
  kV8Window_Confirm_Method = 951,
  kV8Window_Prompt_Method = 952,
  kV8Window_Print_Method = 953,
  kV8Window_RequestIdleCallback_Method = 954,
  kFlexboxPercentagePaddingVertical = 955,
  kFlexboxPercentageMarginVertical = 956,
  kCSPSourceWildcardWouldMatchExactHost = 959,
  kCredentialManagerGet = 960,
  kCredentialManagerGetMediationOptional = 961,
  kCredentialManagerGetMediationSilent = 962,
  kCredentialManagerStore = 963,
  // The above items are available in M47 branch.

  kBlockableMixedContentInSubframeBlocked = 966,
  kAddEventListenerThirdArgumentIsObject = 967,
  kRemoveEventListenerThirdArgumentIsObject = 968,
  kCSSAtRuleCharset = 969,
  kCSSAtRuleFontFace = 970,
  kCSSAtRuleImport = 971,
  kCSSAtRuleKeyframes = 972,
  kCSSAtRuleMedia = 973,
  kCSSAtRuleNamespace = 974,
  kCSSAtRulePage = 975,
  kCSSAtRuleSupports = 976,
  kCSSAtRuleViewport = 977,
  kCSSAtRuleWebkitKeyframes = 978,
  kV8HTMLFieldSetElement_Elements_AttributeGetter = 979,
  kHTMLMediaElementPreloadForcedNone = 980,
  kExternalAddSearchProvider = 981,
  kExternalIsSearchProviderInstalled = 982,
  kV8Permissions_RequestAll_Method = 983,
  kDeviceOrientationAbsoluteInsecureOrigin = 987,
  kDeviceOrientationAbsoluteSecureOrigin = 988,
  kFontFaceConstructor = 989,
  kServiceWorkerControlledPage = 990,
  kMeterElementWithMeterAppearance = 993,
  kMeterElementWithNoneAppearance = 994,
  kSelectionAnchorNode = 997,
  kSelectionAnchorOffset = 998,
  kSelectionFocusNode = 999,
  kSelectionFocusOffset = 1000,
  kSelectionIsCollapsed = 1001,
  kSelectionRangeCount = 1002,
  kSelectionGetRangeAt = 1003,
  kSelectionAddRange = 1004,
  kSelectionRemoveAllRanges = 1005,
  kSelectionCollapse = 1006,
  kSelectionCollapseToStart = 1007,
  kSelectionCollapseToEnd = 1008,
  kSelectionExtend = 1009,
  kSelectionSelectAllChildren = 1010,
  kSelectionDeleteDromDocument = 1011,
  kSelectionDOMString = 1012,
  kInputTypeRangeVerticalAppearance = 1013,
  // The above items are available in M48 branch.

  kCSSFilterReference = 1014,
  kCSSFilterGrayscale = 1015,
  kCSSFilterSepia = 1016,
  kCSSFilterSaturate = 1017,
  kCSSFilterHueRotate = 1018,
  kCSSFilterInvert = 1019,
  kCSSFilterOpacity = 1020,
  kCSSFilterBrightness = 1021,
  kCSSFilterContrast = 1022,
  kCSSFilterBlur = 1023,
  kCSSFilterDropShadow = 1024,
  kBackgroundSyncRegister = 1025,
  kExecCommandOnInputOrTextarea = 1027,
  kV8History_ScrollRestoration_AttributeGetter = 1028,
  kV8History_ScrollRestoration_AttributeSetter = 1029,
  kSVG1DOMFilter = 1030,
  kOfflineAudioContextStartRendering = 1031,
  kOfflineAudioContextSuspend = 1032,
  kOfflineAudioContextResume = 1033,
  kSVG1DOMPaintServer = 1035,
  kSVGSVGElementFragmentSVGView = 1036,
  kSVGSVGElementFragmentSVGViewElement = 1037,
  kPresentationConnectionClose = 1038,
  kSVG1DOMShape = 1039,
  kSVG1DOMText = 1040,
  kRTCPeerConnectionConstructorConstraints = 1041,
  kRTCPeerConnectionConstructorCompliant = 1042,
  kRTCPeerConnectionCreateOfferLegacyFailureCallback = 1044,
  kRTCPeerConnectionCreateOfferLegacyConstraints = 1045,
  kRTCPeerConnectionCreateOfferLegacyOfferOptions = 1046,
  kRTCPeerConnectionCreateOfferLegacyCompliant = 1047,
  kRTCPeerConnectionCreateAnswerLegacyFailureCallback = 1049,
  kRTCPeerConnectionCreateAnswerLegacyConstraints = 1050,
  kRTCPeerConnectionCreateAnswerLegacyCompliant = 1051,
  kRTCPeerConnectionSetLocalDescriptionLegacyNoSuccessCallback = 1052,
  kRTCPeerConnectionSetLocalDescriptionLegacyNoFailureCallback = 1053,
  kRTCPeerConnectionSetLocalDescriptionLegacyCompliant = 1054,
  kRTCPeerConnectionSetRemoteDescriptionLegacyNoSuccessCallback = 1055,
  kRTCPeerConnectionSetRemoteDescriptionLegacyNoFailureCallback = 1056,
  kRTCPeerConnectionSetRemoteDescriptionLegacyCompliant = 1057,
  kRTCPeerConnectionGetStatsLegacyNonCompliant = 1058,
  kNodeFilterIsFunction = 1059,
  kNodeFilterIsObject = 1060,
  kCSSSelectorInternalPseudoListBox = 1062,
  kCSSSelectorInternalMediaControlsOverlayCastButton = 1064,
  kCSSSelectorInternalPseudoSpatialNavigationFocus = 1065,
  kSameOriginTextScript = 1066,
  kSameOriginApplicationScript = 1067,
  kSameOriginOtherScript = 1068,
  kCrossOriginTextScript = 1069,
  kCrossOriginApplicationScript = 1070,
  kCrossOriginOtherScript = 1071,
  kSVG1DOMSVGTests = 1072,
  kDisableRemotePlaybackAttribute = 1074,
  kV8SloppyMode = 1075,
  kV8StrictMode = 1076,
  kV8StrongMode = 1077,
  kAudioNodeConnectToAudioNode = 1078,
  kAudioNodeConnectToAudioParam = 1079,
  kAudioNodeDisconnectFromAudioNode = 1080,
  kAudioNodeDisconnectFromAudioParam = 1081,
  kV8CSSFontFaceRule_Style_AttributeGetter = 1082,
  kSelectionCollapseNull = 1083,
  kSelectionSetBaseAndExtentNull = 1084,
  kV8SVGSVGElement_CreateSVGNumber_Method = 1085,
  kV8SVGSVGElement_CreateSVGLength_Method = 1086,
  kV8SVGSVGElement_CreateSVGAngle_Method = 1087,
  kV8SVGSVGElement_CreateSVGPoint_Method = 1088,
  kV8SVGSVGElement_CreateSVGMatrix_Method = 1089,
  kV8SVGSVGElement_CreateSVGRect_Method = 1090,
  kV8SVGSVGElement_CreateSVGTransform_Method = 1091,
  kV8SVGSVGElement_CreateSVGTransformFromMatrix_Method = 1092,
  kFormNameAccessForNonDescendantImageElement = 1093,
  kV8RegExpPrototypeStickyGetter = 1096,
  kV8RegExpPrototypeToString = 1097,
  kV8InputDeviceCapabilities_FiresTouchEvents_AttributeGetter = 1098,
  kDataElement = 1099,
  kTimeElement = 1100,
  kSVG1DOMUriReference = 1101,
  kSVG1DOMZoomAndPan = 1102,
  kV8SVGGraphicsElement_Transform_AttributeGetter = 1103,
  kMenuItemElement = 1104,
  kMenuItemCloseTag = 1105,
  kSVG1DOMMarkerElement = 1106,
  kSVG1DOMUseElement = 1107,
  kSVG1DOMMaskElement = 1108,
  kV8SVGAElement_Target_AttributeGetter = 1109,
  kV8SVGClipPathElement_ClipPathUnits_AttributeGetter = 1110,
  kSVG1DOMFitToViewBox = 1111,
  kSVG1DOMSVGElement = 1114,
  kSVG1DOMImageElement = 1115,
  kSVG1DOMForeignObjectElement = 1116,
  kAudioContextCreateIIRFilter = 1117,
  // The above items are available in M49 branch

  kCSSSelectorPseudoSlotted = 1118,
  kMediaDevicesEnumerateDevices = 1119,
  kEventComposedPath = 1123,
  kLinkHeaderPreload = 1124,
  kMouseWheelEvent = 1125,
  kWheelEvent = 1126,
  kMouseWheelAndWheelEvent = 1127,
  kBodyScrollsInAdditionToViewport = 1128,
  kDocumentDesignModeEnabeld = 1129,
  kContentEditableTrue = 1130,
  kContentEditableTrueOnHTML = 1131,
  kContentEditablePlainTextOnly = 1132,
  kV8RegExpPrototypeUnicodeGetter = 1133,
  kV8IntlV8Parse = 1134,
  kV8IntlPattern = 1135,
  kV8IntlResolved = 1136,
  kV8PromiseChain = 1137,
  kV8PromiseAccept = 1138,
  kV8PromiseDefer = 1139,
  kEventComposed = 1140,
  kGeolocationInsecureOriginIframe = 1141,
  kGeolocationSecureOriginIframe = 1142,
  kRequestMIDIAccessIframe_ObscuredByFootprinting = 1143,
  kGetUserMediaInsecureOriginIframe = 1144,
  kGetUserMediaSecureOriginIframe = 1145,
  kElementRequestPointerLockIframe = 1146,
  kNotificationAPIInsecureOriginIframe = 1147,
  kNotificationAPISecureOriginIframe = 1148,
  kWebSocket = 1149,
  kMediaStreamConstraintsNameValue = 1150,
  kMediaStreamConstraintsFromDictionary = 1151,
  kMediaStreamConstraintsConformant = 1152,
  kCSSSelectorIndirectAdjacent = 1153,
  kCreateImageBitmap = 1156,
  kPresentationConnectionConnectEventListener = 1157,
  kPresentationConnectionCloseEventListener = 1158,
  kPresentationConnectionTerminateEventListener = 1159,
  kDocumentCreateEventAnimationEvent = 1162,
  kDocumentCreateEventBeforeUnloadEvent = 1166,
  kDocumentCreateEventCompositionEvent = 1168,
  kDocumentCreateEventDragEvent = 1169,
  kDocumentCreateEventErrorEvent = 1170,
  kDocumentCreateEventFocusEvent = 1171,
  kDocumentCreateEventHashChangeEvent = 1172,
  kDocumentCreateEventMutationEvent = 1173,
  kDocumentCreateEventPageTransitionEvent = 1174,
  kDocumentCreateEventPopStateEvent = 1176,
  kDocumentCreateEventTextEvent = 1182,
  kDocumentCreateEventTransitionEvent = 1183,
  kDocumentCreateEventWheelEvent = 1184,
  kDocumentCreateEventTrackEvent = 1186,
  kDocumentCreateEventMutationEvents = 1188,
  kDocumentCreateEventSVGEvents = 1190,
  kDocumentCreateEventDeviceMotionEvent = 1195,
  kDocumentCreateEventDeviceOrientationEvent = 1196,
  kDocumentCreateEventIDBVersionChangeEvent = 1201,
  kDocumentCreateEventStorageEvent = 1221,
  kDocumentCreateEventWebGLContextEvent = 1224,
  kDocumentCreateEventCloseEvent = 1227,
  kDocumentCreateEventKeyboardEvents = 1228,
  kHTMLMediaElement = 1229,
  kHTMLMediaElementInDocument = 1230,
  kHTMLMediaElementControlsAttribute = 1231,
  kV8Animation_Oncancel_AttributeGetter = 1233,
  kV8Animation_Oncancel_AttributeSetter = 1234,
  kV8HTMLCommentInExternalScript = 1235,
  kV8HTMLComment = 1236,
  kV8SloppyModeBlockScopedFunctionRedefinition = 1237,
  kV8ForInInitializer = 1238,
  kV8Animation_Id_AttributeGetter = 1239,
  kV8Animation_Id_AttributeSetter = 1240,
  kApplicationCacheManifestSelectInsecureOrigin = 1245,
  kApplicationCacheManifestSelectSecureOrigin = 1246,
  kApplicationCacheAPIInsecureOrigin = 1247,
  kApplicationCacheAPISecureOrigin = 1248,
  // The above items are available in M50 branch

  kCSSAtRuleApply = 1249, // Removed
  kCSSSelectorPseudoAny = 1250,
  kHTMLLabelElementControlForNonFormAssociatedElement = 1263,
  kHTMLMediaElementLoadNetworkEmptyNotPaused = 1265,
  kV8Window_WebkitSpeechGrammar_ConstructorGetter = 1267,
  kV8Window_WebkitSpeechGrammarList_ConstructorGetter = 1268,
  kV8Window_WebkitSpeechRecognition_ConstructorGetter = 1269,
  kV8Window_WebkitSpeechRecognitionError_ConstructorGetter = 1270,
  kV8Window_WebkitSpeechRecognitionEvent_ConstructorGetter = 1271,
  kV8Window_SpeechSynthesis_AttributeGetter = 1272,
  kV8IDBFactory_WebkitGetDatabaseNames_Method = 1273,
  kScriptPassesCSPDynamic = 1275,
  kCSPWithStrictDynamic = 1277,
  kScrollAnchored = 1278,
  kAddEventListenerFourArguments = 1279,
  kRemoveEventListenerFourArguments = 1280,
  kSVGCalcModeDiscrete = 1287,
  kSVGCalcModeLinear = 1288,
  kSVGCalcModePaced = 1289,
  kSVGCalcModeSpline = 1290,
  kFormSubmissionStarted = 1291,
  kFormValidationStarted = 1292,
  kFormValidationAbortedSubmission = 1293,
  kFormValidationShowedMessage = 1294,
  // The above items are available in M51 branch

  kV8Document_Images_AttributeGetter = 1297,
  kV8Document_Embeds_AttributeGetter = 1298,
  kV8Document_Plugins_AttributeGetter = 1299,
  kV8Document_Links_AttributeGetter = 1300,
  kV8Document_Forms_AttributeGetter = 1301,
  kV8Document_Scripts_AttributeGetter = 1302,
  kV8Document_Anchors_AttributeGetter = 1303,
  kV8Document_Applets_AttributeGetter = 1304,
  kXMLHttpRequestCrossOriginWithCredentials = 1305,
  kMediaStreamTrackRemote = 1306,
  kV8Node_IsConnected_AttributeGetter = 1307,
  kShadowRootDelegatesFocus = 1308,
  kMixedShadowRootV0AndV1 = 1309,
  kFileAPINativeLineEndings = 1320,
  kPointerEventAttributeCount = 1321,
  kCompositedReplication = 1322,
  kV8DataTransferItem_WebkitGetAsEntry_Method = 1325,
  kV8HTMLInputElement_WebkitEntries_AttributeGetter = 1326,
  kEntry_Filesystem_AttributeGetter_IsolatedFileSystem = 1327,
  kEntry_GetMetadata_Method_IsolatedFileSystem = 1328,
  kEntry_MoveTo_Method_IsolatedFileSystem = 1329,
  kEntry_CopyTo_Method_IsolatedFileSystem = 1330,
  kEntry_Remove_Method_IsolatedFileSystem = 1331,
  kEntry_GetParent_Method_IsolatedFileSystem = 1332,
  kEntry_ToURL_Method_IsolatedFileSystem = 1333,
  kDuring_Microtask_Alert = 1334,
  kDuring_Microtask_Confirm = 1335,
  kDuring_Microtask_Print = 1336,
  kDuring_Microtask_Prompt = 1337,
  kDuring_Microtask_SyncXHR = 1338,
  kCredentialManagerGetReturnedCredential = 1342,
  kGeolocationInsecureOriginDeprecatedNotRemoved = 1343,
  kGeolocationInsecureOriginIframeDeprecatedNotRemoved = 1344,
  kProgressElementWithNoneAppearance = 1345,
  kProgressElementWithProgressBarAppearance = 1346,
  kPointerEventAddListenerCount = 1347,
  kCSSValueAppearanceNone = 1351,
  kCSSValueAppearanceNotNone = 1352,
  kCSSValueAppearanceOthers = 1353,
  kCSSValueAppearanceButton = 1354,
  kCSSValueAppearanceCaret = 1355,
  kCSSValueAppearanceCheckbox = 1356,
  kCSSValueAppearanceMenulist = 1357,
  kCSSValueAppearanceMenulistButton = 1358,
  kCSSValueAppearanceListbox = 1359,
  kCSSValueAppearanceRadio = 1360,
  kCSSValueAppearanceSearchField = 1361,
  kCSSValueAppearanceTextField = 1362,
  kAudioContextCreatePannerAutomated = 1363,
  kPannerNodeSetPosition = 1364,
  kPannerNodeSetOrientation = 1365,
  kAudioListenerSetPosition = 1366,
  kAudioListenerSetOrientation = 1367,
  kIntersectionObserver_Constructor = 1368,
  kDurableStoragePersist = 1369,
  kDurableStoragePersisted = 1370,
  kDurableStorageEstimate = 1371,
  kCSSDeepCombinatorAndShadow = 1375,
  kOpacityWithPreserve3DQuirk = 1376,
  kCSSSelectorPseudoReadOnly = 1377,
  kCSSSelectorPseudoReadWrite = 1378,
  // The above items are available in M52 branch

  kCSSSelectorPseudoDefined = 1383,
  kRTCPeerConnectionAddIceCandidatePromise = 1384,
  kRTCPeerConnectionAddIceCandidateLegacy = 1385,
  kRTCIceCandidateDefaultSdpMLineIndex = 1386,
  kMediaStreamConstraintsOldAndNew = 1389,
  kV8ArrayProtectorDirtied = 1390,
  kV8ArraySpeciesModified = 1391,
  kV8ArrayPrototypeConstructorModified = 1392,
  kV8ArrayInstanceProtoModified = 1393,
  kV8ArrayInstanceConstructorModified = 1394,
  kV8LegacyFunctionDeclaration = 1395,
  kV8RegExpPrototypeSourceGetter = 1396,
  kV8RegExpPrototypeOldFlagGetter = 1397,
  kV8DecimalWithLeadingZeroInStrictMode = 1398,
  kGetUserMediaPrefixed = 1400,
  kGetUserMediaLegacy = 1401,
  kGetUserMediaPromise = 1402,
  kCSSFilterFunctionNoArguments = 1403,
  kV8LegacyDateParser = 1404,
  kOpenSearchInsecureOriginInsecureTarget = 1405,
  kOpenSearchInsecureOriginSecureTarget = 1406,
  kOpenSearchSecureOriginInsecureTarget = 1407,
  kOpenSearchSecureOriginSecureTarget = 1408,
  kRegisterProtocolHandlerSecureOrigin = 1409,
  kRegisterProtocolHandlerInsecureOrigin = 1410,
  kCrossOriginWindowAlert = 1411,
  kCrossOriginWindowConfirm = 1412,
  kCrossOriginWindowPrompt = 1413,
  kCrossOriginWindowPrint = 1414,
  kMediaStreamOnActive = 1415,
  kMediaStreamOnInactive = 1416,
  kAddEventListenerPassiveTrue = 1417,
  kAddEventListenerPassiveFalse = 1418,
  kCSPReferrerDirective = 1419,
  kElementRequestPointerLockInShadow = 1421,
  kShadowRootPointerLockElement = 1422,
  kDocumentPointerLockElementInV0Shadow = 1423,
  kTextAreaMaxLength = 1424,
  kTextAreaMinLength = 1425,
  kTopNavigationFromSubFrame = 1426,
  kPrefixedElementRequestFullscreenInShadow = 1427,
  kMediaSourceAbortRemove = 1428,
  kMediaSourceDurationTruncatingBuffered = 1429,
  kAudioContextCrossOriginIframe = 1430,
  // The above items are available in M53 branch

  kPointerEventSetCapture = 1431,
  kPointerEventDispatch = 1432,
  kMIDIMessageEventReceivedTime = 1433,
  kSummaryElementWithDisplayBlockAuthorRule = 1434,
  kV8MediaStream_Active_AttributeGetter = 1435,
  kBeforeInstallPromptEvent = 1436,
  kBeforeInstallPromptEventUserChoice = 1437,
  kBeforeInstallPromptEventPreventDefault = 1438,
  kBeforeInstallPromptEventPrompt = 1439,
  kExecCommandAltersHTMLStructure = 1440,
  kSecureContextCheckPassed = 1441,
  kSecureContextCheckFailed = 1442,
  kSecureContextCheckForSandboxedOriginPassed = 1443,
  kSecureContextCheckForSandboxedOriginFailed = 1444,
  kV8DefineGetterOrSetterWouldThrow = 1445,
  kV8FunctionConstructorReturnedUndefined = 1446,
  kV8BroadcastChannel_Constructor = 1447,
  kV8BroadcastChannel_PostMessage_Method = 1448,
  kV8BroadcastChannel_Close_Method = 1449,
  kTouchStartFired = 1450,
  kMouseDownFired = 1451,
  kPointerDownFired = 1452,
  kPointerDownFiredForTouch = 1453,
  kPointerEventDispatchPointerDown = 1454,
  kSVGSMILBeginOrEndEventValue = 1455,
  kSVGSMILBeginOrEndSyncbaseValue = 1456,
  kSVGSMILElementInsertedAfterLoad = 1457,
  kV8VisualViewport_OffsetLeft_AttributeGetter = 1458,
  kV8VisualViewport_OffsetTop_AttributeGetter = 1459,
  kV8VisualViewport_PageLeft_AttributeGetter = 1460,
  kV8VisualViewport_PageTop_AttributeGetter = 1461,
  kV8VisualViewport_Width_AttributeGetter = 1462,
  kV8VisualViewport_Height_AttributeGetter = 1463,
  kV8VisualViewport_Scale_AttributeGetter = 1464,
  kVisualViewportScrollFired = 1465,
  kVisualViewportResizeFired = 1466,
  kNodeGetRootNode = 1467,
  kSlotChangeEventAddListener = 1468,
  kCSSValueAppearanceButtonRendered = 1469,
  kCSSValueAppearanceButtonForAnchor = 1470,
  kCSSValueAppearanceButtonForButton = 1471,
  kCSSValueAppearanceButtonForOtherButtons = 1472,
  kCSSValueAppearanceTextFieldRendered = 1473,
  kCSSValueAppearanceTextFieldForSearch = 1474,
  kCSSValueAppearanceTextFieldForTextField = 1475,
  kRTCPeerConnectionGetStats = 1476,
  kSVGSMILAnimationAppliedEffect = 1477,
  kPerformanceResourceTimingSizes = 1478,
  kEventSourceDocument = 1479,
  kEventSourceWorker = 1480,
  kSingleOriginInTimingAllowOrigin = 1481,
  kMultipleOriginsInTimingAllowOrigin = 1482,
  kStarInTimingAllowOrigin = 1483,
  kSVGSMILAdditiveAnimation = 1484,
  kSendBeaconWithNonSimpleContentType = 1485,
  kChromeLoadTimesRequestTime = 1486,
  kChromeLoadTimesStartLoadTime = 1487,
  kChromeLoadTimesCommitLoadTime = 1488,
  kChromeLoadTimesFinishDocumentLoadTime = 1489,
  kChromeLoadTimesFinishLoadTime = 1490,
  kChromeLoadTimesFirstPaintTime = 1491,
  kChromeLoadTimesFirstPaintAfterLoadTime = 1492,
  kChromeLoadTimesNavigationType = 1493,
  kChromeLoadTimesWasFetchedViaSpdy = 1494,
  kChromeLoadTimesWasNpnNegotiated = 1495,
  kChromeLoadTimesNpnNegotiatedProtocol = 1496,
  kChromeLoadTimesWasAlternateProtocolAvailable = 1497,
  kChromeLoadTimesConnectionInfo = 1498,
  kChromeLoadTimesUnknown = 1499,
  kSVGViewElement = 1500,
  kWebShareShare = 1501,
  kAuxclickAddListenerCount = 1502,
  kHTMLCanvasElement = 1503,
  kSVGSMILAnimationElementTiming = 1504,
  kSVGSMILBeginEndAnimationElement = 1505,
  kSVGSMILPausing = 1506,
  kSVGSMILCurrentTime = 1507,
  kHTMLBodyElementOnSelectionChangeAttribute = 1508,
  kForeignFetchInterception = 1509,  // Obsolete.
  kUsbGetDevices = 1519,
  kUsbRequestDevice = 1520,
  kUsbDeviceOpen = 1521,
  kUsbDeviceClose = 1522,
  kUsbDeviceSelectConfiguration = 1523,
  kUsbDeviceClaimInterface = 1524,
  kUsbDeviceReleaseInterface = 1525,
  kUsbDeviceSelectAlternateInterface = 1526,
  kUsbDeviceControlTransferIn = 1527,
  kUsbDeviceControlTransferOut = 1528,
  kUsbDeviceClearHalt = 1529,
  kUsbDeviceTransferIn = 1530,
  kUsbDeviceTransferOut = 1531,
  kUsbDeviceIsochronousTransferIn = 1532,
  kUsbDeviceIsochronousTransferOut = 1533,
  kUsbDeviceReset = 1534,
  // The above items are available in M54 branch

  kPointerEnterLeaveFired = 1535,
  kPointerOverOutFired = 1536,
  kDraggableAttribute = 1539,
  kCleanScriptElementWithNonce = 1540,
  kPotentiallyInjectedScriptElementWithNonce = 1541,
  kPendingStylesheetAddedAfterBodyStarted = 1542,
  kUntrustedMouseDownEventDispatchedToSelect = 1543,
  kBlockedSniffingAudioToScript = 1544,
  kBlockedSniffingVideoToScript = 1545,
  kBlockedSniffingCSVToScript = 1546,
  kMetaSetCookie = 1547,
  kMetaRefresh = 1548,
  kMetaSetCookieWhenCSPBlocksInlineScript = 1549,
  kMetaRefreshWhenCSPBlocksInlineScript = 1550,
  kMiddleClickAutoscrollStart = 1551,
  kRTCPeerConnectionCreateOfferOptionsOfferToReceive = 1553,
  kDragAndDropScrollStart = 1554,
  kPresentationConnectionListConnectionAvailableEventListener = 1555,
  kWebAudioAutoplayCrossOriginIframe = 1556,
  kVRGetDisplays = 1558,
  kXSSAuditorBlockedScript = 1581,
  kXSSAuditorBlockedEntirePage = 1582,
  kXSSAuditorDisabled = 1583,
  kXSSAuditorEnabledFilter = 1584,
  kXSSAuditorEnabledBlock = 1585,
  kXSSAuditorInvalid = 1586,
  kTextInputEventOnInput = 1589,
  kTextInputEventOnTextArea = 1590,
  kTextInputEventOnContentEditable = 1591,
  kTextInputEventOnNotNode = 1592,
  kWebkitBeforeTextInsertedOnInput = 1593,
  kWebkitBeforeTextInsertedOnTextArea = 1594,
  kWebkitBeforeTextInsertedOnContentEditable = 1595,
  kWebkitBeforeTextInsertedOnNotNode = 1596,
  kWebkitEditableContentChangedOnInput = 1597,
  kWebkitEditableContentChangedOnTextArea = 1598,
  kWebkitEditableContentChangedOnContentEditable = 1599,
  kWebkitEditableContentChangedOnNotNode = 1600,
  kV8NavigatorUserMediaError_ConstraintName_AttributeGetter = 1601,
  kV8HTMLMediaElement_SrcObject_AttributeGetter = 1602,
  kV8HTMLMediaElement_SrcObject_AttributeSetter = 1603,
  kCreateObjectURLBlob = 1604,
  kCreateObjectURLMediaSource = 1605,
  kCreateObjectURLMediaStream = 1606,
  kLongTaskObserver = 1615,
  kCSSOffsetInEffect = 1617,
  // The above items are available in M55 branch

  kVRGetDisplaysInsecureOrigin = 1618,
  kVRRequestPresent = 1619,
  kVRRequestPresentInsecureOrigin = 1620,
  kVRDeprecatedFieldOfView = 1621,
  kVideoInCanvas = 1622,
  kHiddenAutoplayedVideoInCanvas = 1623,
  kOffscreenCanvas = 1624,
  kGamepadPose = 1625,
  kGamepadHand = 1626,
  kGamepadDisplayId = 1627,
  kGamepadButtonTouched = 1628,
  kGamepadPoseHasOrientation = 1629,
  kGamepadPoseHasPosition = 1630,
  kGamepadPosePosition = 1631,
  kGamepadPoseLinearVelocity = 1632,
  kGamepadPoseLinearAcceleration = 1633,
  kGamepadPoseOrientation = 1634,
  kGamepadPoseAngularVelocity = 1635,
  kGamepadPoseAngularAcceleration = 1636,
  kV8RTCDataChannel_MaxRetransmitTime_AttributeGetter = 1638,
  kV8RTCDataChannel_MaxRetransmits_AttributeGetter = 1639,
  kV8RTCDataChannel_Reliable_AttributeGetter = 1640,
  kV8RTCPeerConnection_AddStream_Method = 1641,
  kV8RTCPeerConnection_CreateDTMFSender_Method = 1642,
  kV8RTCPeerConnection_GetLocalStreams_Method = 1643,
  kV8RTCPeerConnection_GetRemoteStreams_Method = 1644,
  kV8RTCPeerConnection_RemoveStream_Method = 1646,
  kRTCPeerConnectionCreateDataChannelMaxRetransmitTime = 1648,
  kRTCPeerConnectionCreateDataChannelMaxRetransmits = 1649,
  kAudioContextCreateConstantSource = 1650,
  kWebAudioConstantSourceNode = 1651,
  kLoopbackEmbeddedInSecureContext = 1652,
  kLoopbackEmbeddedInNonSecureContext = 1653,
  kBlinkMacSystemFont = 1654,
  kRTCIceServerURL = 1656,
  kRTCIceServerURLs = 1657,
  kOffscreenCanvasTransferToImageBitmap2D = 1658,
  kOffscreenCanvasTransferToImageBitmapWebGL = 1659,
  kOffscreenCanvasCommit2D = 1660,
  kOffscreenCanvasCommitWebGL = 1661,
  kRTCConfigurationIceTransportPolicy = 1662,
  kRTCConfigurationIceTransports = 1664,
  kDocumentFullscreenElementInV0Shadow = 1665,
  kScriptWithCSPBypassingSchemeParserInserted = 1666,
  kScriptWithCSPBypassingSchemeNotParserInserted = 1667,
  kDocumentCreateElement2ndArgStringHandling = 1668,
  kV8MediaRecorder_Start_Method = 1669,
  kWebBluetoothRequestDevice = 1670,
  kUnitlessPerspectiveInPerspectiveProperty = 1671,
  kUnitlessPerspectiveInTransformProperty = 1672,
  kV8RTCSessionDescription_Type_AttributeGetter = 1673,
  kV8RTCSessionDescription_Type_AttributeSetter = 1674,
  kV8RTCSessionDescription_Sdp_AttributeGetter = 1675,
  kV8RTCSessionDescription_Sdp_AttributeSetter = 1676,
  kRTCSessionDescriptionInitNoType = 1677,
  kRTCSessionDescriptionInitNoSdp = 1678,
  kHTMLMediaElementPreloadForcedMetadata = 1679,
  kGenericSensorStart = 1680,
  kGenericSensorStop = 1681,
  kTouchEventPreventedNoTouchAction = 1682,
  kTouchEventPreventedForcedDocumentPassiveNoTouchAction = 1683,
  kV8Event_StopPropagation_Method = 1684,
  kV8Event_StopImmediatePropagation_Method = 1685,
  kImageCaptureConstructor = 1686,
  kV8Document_RootScroller_AttributeGetter = 1687,
  kV8Document_RootScroller_AttributeSetter = 1688,
  kCustomElementRegistryDefine = 1689,
  kLinkHeaderServiceWorker = 1690,
  // The above items are available in M56 branch.

  kCSSFlexibleBox = 1692,
  kCSSGridLayout = 1693,
  kFullscreenAllowedByOrientationChange = 1696,
  kServiceWorkerRespondToNavigationRequestWithRedirectedResponse = 1697,
  kV8AudioContext_Constructor = 1698,
  kV8OfflineAudioContext_Constructor = 1699,
  kAppInstalledEventAddListener = 1700,
  kAudioContextGetOutputTimestamp = 1701,
  kV8MediaStreamAudioDestinationNode_Constructor = 1702,
  kV8AnalyserNode_Constructor = 1703,
  kV8AudioBuffer_Constructor = 1704,
  kV8AudioBufferSourceNode_Constructor = 1705,
  kV8AudioProcessingEvent_Constructor = 1706,
  kV8BiquadFilterNode_Constructor = 1707,
  kV8ChannelMergerNode_Constructor = 1708,
  kV8ChannelSplitterNode_Constructor = 1709,
  kV8ConstantSourceNode_Constructor = 1710,
  kV8ConvolverNode_Constructor = 1711,
  kV8DelayNode_Constructor = 1712,
  kV8DynamicsCompressorNode_Constructor = 1713,
  kV8GainNode_Constructor = 1714,
  kV8IIRFilterNode_Constructor = 1715,
  kV8MediaElementAudioSourceNode_Constructor = 1716,
  kV8MediaStreamAudioSourceNode_Constructor = 1717,
  kV8OfflineAudioCompletionEvent_Constructor = 1718,
  kV8OscillatorNode_Constructor = 1719,
  kV8PannerNode_Constructor = 1720,
  kV8PeriodicWave_Constructor = 1721,
  kV8StereoPannerNode_Constructor = 1722,
  kV8WaveShaperNode_Constructor = 1723,
  kV8Headers_GetAll_Method = 1724,
  kNavigatorVibrateEngagementNone = 1725,
  kNavigatorVibrateEngagementMinimal = 1726,
  kNavigatorVibrateEngagementLow = 1727,
  kNavigatorVibrateEngagementMedium = 1728,
  kNavigatorVibrateEngagementHigh = 1729,
  kNavigatorVibrateEngagementMax = 1730,
  kAlertEngagementNone = 1731,
  kAlertEngagementMinimal = 1732,
  kAlertEngagementLow = 1733,
  kAlertEngagementMedium = 1734,
  kAlertEngagementHigh = 1735,
  kAlertEngagementMax = 1736,
  kConfirmEngagementNone = 1737,
  kConfirmEngagementMinimal = 1738,
  kConfirmEngagementLow = 1739,
  kConfirmEngagementMedium = 1740,
  kConfirmEngagementHigh = 1741,
  kConfirmEngagementMax = 1742,
  kPromptEngagementNone = 1743,
  kPromptEngagementMinimal = 1744,
  kPromptEngagementLow = 1745,
  kPromptEngagementMedium = 1746,
  kPromptEngagementHigh = 1747,
  kPromptEngagementMax = 1748,
  kTopNavInSandbox = 1749,
  kTopNavInSandboxWithoutGesture = 1750,
  kTopNavInSandboxWithPerm = 1751,
  kTopNavInSandboxWithPermButNoGesture = 1752,
  kReferrerPolicyHeader = 1753,
  kHTMLAnchorElementReferrerPolicyAttribute = 1754,
  kHTMLIFrameElementReferrerPolicyAttribute = 1755,
  kHTMLImageElementReferrerPolicyAttribute = 1756,
  kHTMLLinkElementReferrerPolicyAttribute = 1757,
  kBaseElement = 1758,
  kBaseWithCrossOriginHref = 1759,
  kBaseWithDataHref = 1760,
  kBaseWithNewlinesInTarget = 1761,
  kBaseWithOpenBracketInTarget = 1762,
  kBaseWouldBeBlockedByDefaultSrc = 1763,
  kV8AssigmentExpressionLHSIsCallInSloppy = 1764,
  kV8AssigmentExpressionLHSIsCallInStrict = 1765,
  kV8PromiseConstructorReturnedUndefined = 1766,
  kFormSubmittedWithUnclosedFormControl = 1767,
  kScrollbarUseVerticalScrollbarButton = 1777,
  kScrollbarUseVerticalScrollbarThumb = 1778,
  kScrollbarUseVerticalScrollbarTrack = 1779,
  kScrollbarUseHorizontalScrollbarButton = 1780,
  kScrollbarUseHorizontalScrollbarThumb = 1781,
  kScrollbarUseHorizontalScrollbarTrack = 1782,
  kHTMLTableCellElementColspan = 1783,
  kHTMLTableCellElementColspanGreaterThan1000 = 1784,
  kHTMLTableCellElementColspanGreaterThan8190 = 1785,
  kSelectionAddRangeIntersect = 1786,
  kPostMessageFromInsecureToSecureToplevel = 1787,
  // The above items are available in M57 branch.

  kV8MediaSession_Metadata_AttributeGetter = 1788,
  kV8MediaSession_Metadata_AttributeSetter = 1789,
  kV8MediaSession_PlaybackState_AttributeGetter = 1790,
  kV8MediaSession_PlaybackState_AttributeSetter = 1791,
  kV8MediaSession_SetActionHandler_Method = 1792,
  kWebNFCPush = 1793,
  kWebNFCCancelPush = 1794,
  kWebNFCWatch = 1795,
  kWebNFCCancelWatch = 1796,
  kAudioParamCancelAndHoldAtTime = 1797,
  kCSSValueUserModifyReadOnly = 1798,
  kCSSValueUserModifyReadWrite = 1799,
  kCSSValueUserModifyReadWritePlaintextOnly = 1800,
  kCSSValueOnDemand = 1802,
  kServiceWorkerNavigationPreload = 1803,
  kFullscreenRequestWithPendingElement = 1804,
  kHTMLIFrameElementAllowfullscreenAttributeSetAfterContentLoad = 1805,
  kPointerEventSetCaptureOutsideDispatch = 1806,
  kNotificationPermissionRequestedInsecureOrigin = 1807,
  kV8DeprecatedStorageInfo_QueryUsageAndQuota_Method = 1808,
  kV8DeprecatedStorageInfo_RequestQuota_Method = 1809,
  kV8DeprecatedStorageQuota_QueryUsageAndQuota_Method = 1810,
  kV8DeprecatedStorageQuota_RequestQuota_Method = 1811,
  kV8FileReaderSync_Constructor = 1812,
  kV8HTMLVideoElement_Poster_AttributeGetter = 1815,
  kV8HTMLVideoElement_Poster_AttributeSetter = 1816,
  kNotificationPermissionRequestedIframe = 1817,
  kPresentationReceiverInsecureOrigin = 1819,
  kPresentationReceiverSecureOrigin = 1820,
  kPresentationRequestInsecureOrigin = 1821,
  kPresentationRequestSecureOrigin = 1822,
  kRtcpMuxPolicyNegotiate = 1823,
  kDOMClobberedVariableAccessed = 1824,
  kHTMLDocumentCreateProcessingInstruction = 1825,
  kFetchResponseConstructionWithStream = 1826,
  kLocationOrigin = 1827,
  kDocumentOrigin = 1828,
  kCanvas2DFilter = 1830,
  kCanvas2DImageSmoothingQuality = 1831,
  kCanvasToBlob = 1832,
  kCanvasToDataURL = 1833,
  kOffscreenCanvasConvertToBlob = 1834,
  kSVGInCanvas2D = 1835,
  kSVGInWebGL = 1836,
  kSelectionFuncionsChangeFocus = 1837,
  kHTMLObjectElementGetter = 1838,
  kHTMLObjectElementSetter = 1839,
  kHTMLEmbedElementGetter = 1840,
  kHTMLEmbedElementSetter = 1841,
  kTransformUsesBoxSizeOnSVG = 1842,
  // The above items are available in M58 branch.

  kScrollByKeyboardArrowKeys = 1843,
  kScrollByKeyboardPageUpDownKeys = 1844,
  kScrollByKeyboardHomeEndKeys = 1845,
  kScrollByKeyboardSpacebarKey = 1846,
  kScrollByTouch = 1847,
  kScrollByWheel = 1848,
  kScheduledActionIgnored = 1849,
  kGetCanvas2DContextAttributes = 1850,
  kV8HTMLInputElement_Capture_AttributeGetter = 1851,
  kV8HTMLInputElement_Capture_AttributeSetter = 1852,
  kHTMLMediaElementControlsListAttribute = 1853,
  kHTMLMediaElementControlsListNoDownload = 1854,
  kHTMLMediaElementControlsListNoFullscreen = 1855,
  kHTMLMediaElementControlsListNoRemotePlayback = 1856,
  kPointerEventClickRetargetCausedByCapture = 1857,
  kVRDisplayDisplayName = 1861,
  kVREyeParametersOffset = 1862,
  kVRPoseLinearVelocity = 1863,
  kVRPoseLinearAcceleration = 1864,
  kVRPoseAngularVelocity = 1865,
  kVRPoseAngularAcceleration = 1866,
  kCSSOverflowPaged = 1867,
  kChildSrcAllowedWorkerThatScriptSrcBlocked = 1868,
  kHTMLTableElementPresentationAttributeBackground = 1869,
  kV8Navigator_GetInstalledRelatedApps_Method = 1870,
  kNamedAccessOnWindow_ChildBrowsingContext = 1871,
  kNamedAccessOnWindow_ChildBrowsingContext_CrossOriginNameMismatch = 1872,
  kV0CustomElementsRegisterHTMLCustomTag = 1873,
  kV0CustomElementsRegisterHTMLTypeExtension = 1874,
  kV0CustomElementsRegisterSVGElement = 1875,
  kV0CustomElementsRegisterEmbedderElement = 1876,
  kV0CustomElementsCreateCustomTagElement = 1877,
  kV0CustomElementsCreateTypeExtensionElement = 1878,
  kV0CustomElementsConstruct = 1879,
  kV8IDBObserver_Observe_Method = 1880,
  kV8IDBObserver_Unobserve_Method = 1881,
  kWebBluetoothRemoteCharacteristicGetDescriptor = 1882,
  kWebBluetoothRemoteCharacteristicGetDescriptors = 1883,
  kWebBluetoothRemoteCharacteristicReadValue = 1884,
  kWebBluetoothRemoteCharacteristicWriteValue = 1885,
  kWebBluetoothRemoteCharacteristicStartNotifications = 1886,
  kWebBluetoothRemoteCharacteristicStopNotifications = 1887,
  kWebBluetoothRemoteDescriptorReadValue = 1888,
  kWebBluetoothRemoteDescriptorWriteValue = 1889,
  kWebBluetoothRemoteServerConnect = 1890,
  kWebBluetoothRemoteServerDisconnect = 1891,
  kWebBluetoothRemoteServerGetPrimaryService = 1892,
  kWebBluetoothRemoteServerGetPrimaryServices = 1893,
  kWebBluetoothRemoteServiceGetCharacteristic = 1894,
  kWebBluetoothRemoteServiceGetCharacteristics = 1895,
  kHTMLContentElement = 1896,
  kHTMLShadowElement = 1897,
  kHTMLSlotElement = 1898,
  kAccelerometerConstructor = 1899,
  kAbsoluteOrientationSensorConstructor = 1900,
  kAmbientLightSensorConstructor = 1901,
  kGenericSensorOnActivate = 1902,
  kGenericSensorOnChange = 1903,
  kGenericSensorOnError = 1904,
  kGenericSensorActivated = 1905,
  kGyroscopeConstructor = 1906,
  kMagnetometerConstructor = 1907,
  kOrientationSensorPopulateMatrix = 1908,
  kWindowOpenWithInvalidURL = 1909,
  kCrossOriginMainFrameNulledNameAccessed = 1910,
  kMenuItemElementIconAttribute = 1911,
  kWebkitCSSMatrixSetMatrixValue = 1912,
  kWebkitCSSMatrixConstructFromString = 1913,
  kCanRequestURLHTTPContainingNewline = 1914,
  kGetGamepads = 1916,
  kMediaStreamConstraintsAudio = 1918,
  kMediaStreamConstraintsAudioUnconstrained = 1919,
  kMediaStreamConstraintsVideo = 1920,
  kMediaStreamConstraintsVideoUnconstrained = 1921,
  kMediaStreamConstraintsWidth = 1922,
  kMediaStreamConstraintsHeight = 1923,
  kMediaStreamConstraintsAspectRatio = 1924,
  kMediaStreamConstraintsFrameRate = 1925,
  kMediaStreamConstraintsFacingMode = 1926,
  kMediaStreamConstraintsVolume = 1927,
  kMediaStreamConstraintsSampleRate = 1928,
  kMediaStreamConstraintsSampleSize = 1929,
  kMediaStreamConstraintsEchoCancellation = 1930,
  kMediaStreamConstraintsLatency = 1931,
  kMediaStreamConstraintsChannelCount = 1932,
  kMediaStreamConstraintsDeviceIdAudio = 1933,
  kMediaStreamConstraintsDeviceIdVideo = 1934,
  kMediaStreamConstraintsDisableLocalEcho = 1935,
  kMediaStreamConstraintsGroupIdAudio = 1936,
  kMediaStreamConstraintsGroupIdVideo = 1937,
  kMediaStreamConstraintsVideoKind = 1938,
  kMediaStreamConstraintsDepthNear = 1939,
  kMediaStreamConstraintsDepthFar = 1940,
  kMediaStreamConstraintsFocalLengthX = 1941,
  kMediaStreamConstraintsFocalLengthY = 1942,
  kMediaStreamConstraintsMediaStreamSourceAudio = 1943,
  kMediaStreamConstraintsMediaStreamSourceVideo = 1944,
  kMediaStreamConstraintsRenderToAssociatedSink = 1945,
  kMediaStreamConstraintsHotwordEnabled = 1946,
  kMediaStreamConstraintsGoogEchoCancellation = 1947,
  kMediaStreamConstraintsGoogExperimentalEchoCancellation = 1948,
  kMediaStreamConstraintsGoogAutoGainControl = 1949,
  kMediaStreamConstraintsGoogExperimentalAutoGainControl = 1950,
  kMediaStreamConstraintsGoogNoiseSuppression = 1951,
  kMediaStreamConstraintsGoogHighpassFilter = 1952,
  kMediaStreamConstraintsGoogTypingNoiseDetection = 1953,
  kMediaStreamConstraintsGoogExperimentalNoiseSuppression = 1954,
  kMediaStreamConstraintsGoogBeamforming = 1955,
  kMediaStreamConstraintsGoogArrayGeometry = 1956,
  kMediaStreamConstraintsGoogAudioMirroring = 1957,
  kMediaStreamConstraintsGoogDAEchoCancellation = 1958,
  kMediaStreamConstraintsGoogNoiseReduction = 1959,
  kMediaStreamConstraintsGoogPowerLineFrequency = 1960,
  // The above items are available in M59 branch.

  kViewportFixedPositionUnderFilter = 1961,
  kRequestMIDIAccessWithSysExOption_ObscuredByFootprinting = 1962,
  kRequestMIDIAccessIframeWithSysExOption_ObscuredByFootprinting = 1963,
  kGamepadAxes = 1964,
  kGamepadButtons = 1965,
  kDispatchMouseEventOnDisabledFormControl = 1967,
  kElementNameDOMInvalidHTMLParserValid = 1968,
  kElementNameDOMValidHTMLParserInvalid = 1969,
  kGATTServerDisconnectedEvent = 1970,
  kAnchorClickDispatchForNonConnectedNode = 1971,
  kHTMLParseErrorNestedForm = 1972,
  kFontShapingNotDefGlyphObserved = 1973,
  kPostMessageOutgoingWouldBeBlockedByConnectSrc = 1974,
  kPostMessageIncomingWouldBeBlockedByConnectSrc = 1975,
  kPaymentRequestNetworkNameInSupportedMethods = 1976,
  kCrossOriginPropertyAccess = 1977,
  kCrossOriginPropertyAccessFromOpener = 1978,
  kCredentialManagerCreate = 1979,
  kWebDatabaseCreateDropFTS3Table = 1980,
  kFieldEditInSecureContext = 1981,
  kFieldEditInNonSecureContext = 1982,
  kCredentialManagerGetMediationRequired = 1984,
  kNetInfoRtt = 1989,
  kNetInfoDownlink = 1990,
  kShapeDetection_BarcodeDetectorConstructor = 1991,
  kShapeDetection_FaceDetectorConstructor = 1992,
  kShapeDetection_TextDetectorConstructor = 1993,
  kInertAttribute = 1995,
  kPluginInstanceAccessFromIsolatedWorld = 1996,
  kPluginInstanceAccessFromMainWorld = 1997,
  kShowModalForElementInFullscreenStack = 2000,
  kThreeValuedPositionBackground = 2001,
  kUnitlessZeroAngleFilter = 2007,
  kUnitlessZeroAngleGradient = 2008,
  kUnitlessZeroAngleTransform = 2010,
  kCredentialManagerPreventSilentAccess = 2012,
  kNetInfoEffectiveType = 2013,
  kV8SpeechRecognition_Start_Method = 2014,
  kTableRowDirectionDifferentFromTable = 2015,
  kTableSectionDirectionDifferentFromTable = 2016,
  // The above items are available in M60 branch.

  kClientHintsDeviceMemory = 2017,
  kCSSRegisterProperty = 2018,
  kRelativeOrientationSensorConstructor = 2019,
  kSmoothScrollJSInterventionActivated = 2020,
  kBudgetAPIGetCost = 2021,
  kBudgetAPIGetBudget = 2022,
  kCrossOriginMainFrameNulledNonEmptyNameAccessed = 2023,
  kDeprecatedTimingFunctionStepMiddle = 2024,
  kDocumentDomainSetWithNonDefaultPort = 2025,
  kDocumentDomainSetWithDefaultPort = 2026,
  kFeaturePolicyHeader = 2027,
  kFeaturePolicyAllowAttribute = 2028,
  kMIDIPortOpen = 2029,
  kMIDIOutputSend = 2030,
  kMIDIMessageEvent = 2031,
  kFetchEventIsReload = 2032,
  kServiceWorkerClientFrameType = 2033,
  kQuirksModeDocument = 2034,
  kLimitedQuirksModeDocument = 2035,
  kEncryptedMediaCrossOriginIframe = 2036,
  kCSSSelectorWebkitMediaControls = 2037,
  kCSSSelectorWebkitMediaControlsOverlayEnclosure = 2038,
  kCSSSelectorWebkitMediaControlsOverlayPlayButton = 2039,
  kCSSSelectorWebkitMediaControlsEnclosure = 2040,
  kCSSSelectorWebkitMediaControlsPanel = 2041,
  kCSSSelectorWebkitMediaControlsPlayButton = 2042,
  kCSSSelectorWebkitMediaControlsCurrentTimeDisplay = 2043,
  kCSSSelectorWebkitMediaControlsTimeRemainingDisplay = 2044,
  kCSSSelectorWebkitMediaControlsTimeline = 2045,
  kCSSSelectorWebkitMediaControlsTimelineContainer = 2046,
  kCSSSelectorWebkitMediaControlsMuteButton = 2047,
  kCSSSelectorWebkitMediaControlsVolumeSlider = 2048,
  kCSSSelectorWebkitMediaControlsFullscreenButton = 2049,
  kCSSSelectorWebkitMediaControlsToggleClosedCaptionsButton = 2050,
  kLinearAccelerationSensorConstructor = 2051,
  kReportUriMultipleEndpoints = 2052,
  kReportUriSingleEndpoint = 2053,
  kV8ConstructorNonUndefinedPrimitiveReturn = 2054,
  kEncryptedMediaDisallowedByFeaturePolicyInCrossOriginIframe = 2055,
  kGeolocationDisallowedByFeaturePolicyInCrossOriginIframe = 2056,
  kGetUserMediaMicDisallowedByFeaturePolicyInCrossOriginIframe = 2057,
  kGetUserMediaCameraDisallowedByFeaturePolicyInCrossOriginIframe = 2058,
  kRequestMIDIAccessDisallowedByFeaturePolicyInCrossOriginIframe = 2059,
  kMediaSourceKeyframeTimeGreaterThanDependant = 2060,
  kMediaSourceMuxedSequenceMode = 2061,
  kPrepareModuleScript = 2062,
  // The above items are available as of the M61 branch.

  kPresentationRequestStartSecureOrigin = 2063,
  kPresentationRequestStartInsecureOrigin = 2064,
  kPersistentClientHintHeader = 2065,
  kStyleSheetListNonNullAnonymousNamedGetter = 2066,
  kOffMainThreadFetch = 2067,
  kARIAActiveDescendantAttribute = 2069,
  kARIAAtomicAttribute = 2070,
  kARIAAutocompleteAttribute = 2071,
  kARIABusyAttribute = 2072,
  kARIACheckedAttribute = 2073,
  kARIAColCountAttribute = 2074,
  kARIAColIndexAttribute = 2075,
  kARIAColSpanAttribute = 2076,
  kARIAControlsAttribute = 2077,
  kARIACurrentAttribute = 2078,
  kARIADescribedByAttribute = 2079,
  kARIADetailsAttribute = 2080,
  kARIADisabledAttribute = 2081,
  kARIADropEffectAttribute = 2082,
  kARIAErrorMessageAttribute = 2083,
  kARIAExpandedAttribute = 2084,
  kARIAFlowToAttribute = 2085,
  kARIAGrabbedAttribute = 2086,
  kARIAHasPopupAttribute = 2087,
  kARIAHelpAttribute = 2088,
  kARIAHiddenAttribute = 2089,
  kARIAInvalidAttribute = 2090,
  kARIAKeyShortcutsAttribute = 2091,
  kARIALabelAttribute = 2092,
  kARIALabeledByAttribute = 2093,
  kARIALabelledByAttribute = 2094,
  kARIALevelAttribute = 2095,
  kARIALiveAttribute = 2096,
  kARIAModalAttribute = 2097,
  kARIAMultilineAttribute = 2098,
  kARIAMultiselectableAttribute = 2099,
  kARIAOrientationAttribute = 2100,
  kARIAOwnsAttribute = 2101,
  kARIAPlaceholderAttribute = 2102,
  kARIAPosInSetAttribute = 2103,
  kARIAPressedAttribute = 2104,
  kARIAReadOnlyAttribute = 2105,
  kARIARelevantAttribute = 2106,
  kARIARequiredAttribute = 2107,
  kARIARoleDescriptionAttribute = 2108,
  kARIARowCountAttribute = 2109,
  kARIARowIndexAttribute = 2110,
  kARIARowSpanAttribute = 2111,
  kARIASelectedAttribute = 2112,
  kARIASetSizeAttribute = 2113,
  kARIASortAttribute = 2114,
  kARIAValueMaxAttribute = 2115,
  kARIAValueMinAttribute = 2116,
  kARIAValueNowAttribute = 2117,
  kARIAValueTextAttribute = 2118,
  kV8LabeledExpressionStatement = 2119,
  kNavigatorDeviceMemory = 2121,
  kFixedWidthTableDistributionChanged = 2122,
  kWebkitBoxLayout = 2123,
  kWebkitBoxLayoutHorizontal = 2124,
  kWebkitBoxLayoutVertical = 2125,
  kWebkitBoxAlignNotInitial = 2126,
  kWebkitBoxDirectionNotInitial = 2127,
  kWebkitBoxLinesNotInitial = 2128,
  kWebkitBoxPackNotInitial = 2129,
  kWebkitBoxChildFlexNotInitial = 2130,
  kWebkitBoxChildFlexGroupNotInitial = 2131,
  kWebkitBoxChildOrdinalGroupNotInitial = 2132,
  kWebkitBoxNotDefaultOrder = 2133,
  kWebkitBoxNoChildren = 2134,
  kWebkitBoxOneChild = 2135,
  kWebkitBoxOneChildIsLayoutBlockFlowInline = 2136,
  kWebkitBoxManyChildren = 2137,
  kWebkitBoxLineClamp = 2138,
  kWebkitBoxLineClampPercentage = 2139,
  kWebkitBoxLineClampNoChildren = 2140,
  kWebkitBoxLineClampOneChild = 2141,
  kWebkitBoxLineClampOneChildIsLayoutBlockFlowInline = 2142,
  kWebkitBoxLineClampManyChildren = 2143,
  kWebkitBoxLineClampDoesSomething = 2144,
  // The above items are available as of the M62 branch.

  kFeaturePolicyAllowAttributeDeprecatedSyntax = 2145,
  kSuppressHistoryEntryWithoutUserGesture = 2146,
  kPerformanceServerTiming = 2157,
  kFileReaderResultBeforeCompletion = 2158,
  kSyncXhrInPageDismissal = 2159,
  kAsyncXhrInPageDismissal = 2160,
  kAnimationSetPlaybackRateCompensatorySeek = 2162,
  kDeepCombinatorInStaticProfile = 2163,
  kPseudoShadowInStaticProfile = 2164,
  kSchemeBypassesCSP = 2165,
  kInnerSchemeBypassesCSP = 2166,
  kSameOriginApplicationOctetStream = 2167,
  kSameOriginApplicationXml = 2168,
  kSameOriginTextHtml = 2169,
  kSameOriginTextPlain = 2170,
  kSameOriginTextXml = 2171,
  kCrossOriginApplicationOctetStream = 2172,
  kCrossOriginApplicationXml = 2173,
  kCrossOriginTextHtml = 2174,
  kCrossOriginTextPlain = 2175,
  kCrossOriginTextXml = 2176,
  kSameOriginWorkerApplicationOctetStream = 2177,
  kSameOriginWorkerApplicationXml = 2178,
  kSameOriginWorkerTextHtml = 2179,
  kSameOriginWorkerTextPlain = 2180,
  kSameOriginWorkerTextXml = 2181,
  kCrossOriginWorkerApplicationOctetStream = 2182,
  kCrossOriginWorkerApplicationXml = 2183,
  kCrossOriginWorkerTextHtml = 2184,
  kCrossOriginWorkerTextPlain = 2185,
  kCrossOriginWorkerTextXml = 2186,
  // The above items are available as of the M63 branch.

  kPerformanceObserverForWindow = 2188,
  kPerformanceObserverForWorker = 2189,
  kPaintTimingObserved = 2190,
  kPaintTimingRequested = 2191,
  kHTMLMediaElementMediaPlaybackRateOutOfRange = 2192,
  kCookieSet = 2194,
  kCookieGet = 2195,
  kGeolocationDisabledByFeaturePolicy = 2196,
  kEncryptedMediaDisabledByFeaturePolicy = 2197,
  kBatteryStatusGetBattery = 2198,
  kBatteryStatusInsecureOrigin = 2199,
  kBatteryStatusCrossOrigin = 2200,
  kBatteryStatusSameOriginABA = 2201,
  kHasIDClassTagAttribute = 2203,
  kHasBeforeOrAfterPseudoElement = 2204,
  kShapeOutsideMaybeAffectedInlineSize = 2205,
  kShapeOutsideMaybeAffectedInlinePosition = 2206,
  kGamepadVibrationActuator = 2207,
  kMicrophoneDisabledByFeaturePolicyEstimate = 2208,
  kCameraDisabledByFeaturePolicyEstimate = 2209,
  kMidiDisabledByFeaturePolicy = 2210,
  kGeolocationGetCurrentPosition = 2214,
  kGeolocationWatchPosition = 2215,
  kDataUriHasOctothorpe = 2216,
  kNetInfoSaveData = 2217,
  kV8Element_GetClientRects_Method = 2218,
  kV8Element_GetBoundingClientRect_Method = 2219,
  kV8Range_GetClientRects_Method = 2220,
  kV8Range_GetBoundingClientRect_Method = 2221,
  kV8ErrorCaptureStackTrace = 2222,
  kV8ErrorPrepareStackTrace = 2223,
  kV8ErrorStackTraceLimit = 2224,
  kPaintWorklet = 2225,
  kDocumentPageHideRegistered = 2226,
  kDocumentPageHideFired = 2227,
  kDocumentPageShowRegistered = 2228,
  kDocumentPageShowFired = 2229,
  kReplaceCharsetInXHR = 2230,
  kRespondToSameOriginRequestWithCrossOriginResponse = 2231,  // Obsolete.
  kLinkRelModulePreload = 2232,
  kCSPWithUnsafeEval = 2236,
  kWebAssemblyInstantiation = 2237,
  kV8IndexAccessor = 2238,
  kV8MediaCapabilities_DecodingInfo_Method = 2239,
  kV8MediaCapabilities_EncodingInfo_Method = 2240,
  kV8MediaCapabilitiesInfo_Supported_AttributeGetter = 2241,
  kV8MediaCapabilitiesInfo_Smooth_AttributeGetter = 2242,
  kV8MediaCapabilitiesInfo_PowerEfficient_AttributeGetter = 2243,
  kWindowEventInV0ShadowTree = 2244,
  kHTMLAnchorElementDownloadInSandboxWithUserGesture = 2245,
  kHTMLAnchorElementDownloadInSandboxWithoutUserGesture = 2246,
  kWindowOpenRealmMismatch = 2247,
  kGridRowTrackPercentIndefiniteHeight = 2248,
  kVRGetDisplaysSupportsPresent = 2249,
  kDuplicatedAttribute = 2250,
  kDuplicatedAttributeForExecutedScript = 2251,
  kV8RTCPeerConnection_GetSenders_Method = 2252,
  kV8RTCPeerConnection_GetReceivers_Method = 2253,
  kV8RTCPeerConnection_AddTrack_Method = 2254,
  kV8RTCPeerConnection_RemoveTrack_Method = 2255,
  kLocalCSSFile = 2256,
  kLocalCSSFileExtensionRejected = 2257,
  kUserMediaDisableHardwareNoiseSuppression = 2258,
  // The above items are available as of the M64 branch.

  kCertificateTransparencyRequiredErrorOnResourceLoad = 2259,
  kCSSSelectorPseudoWebkitAnyLink = 2260,
  kAudioWorkletAddModule = 2261,
  kAudioWorkletGlobalScopeRegisterProcessor = 2262,
  kAudioWorkletNodeConstructor = 2263,
  kHTMLMediaElementEmptyLoadWithFutureData = 2264,
  kCSSValueDisplayContents = 2265,
  kCSSSelectorPseudoAnyLink = 2266,
  kFileAccessedCache = 2267,
  kFileAccessedCookies = 2268,
  kFileAccessedDatabase = 2269,
  kFileAccessedFileSystem = 2270,
  kFileAccessedLocalStorage = 2271,
  kFileAccessedLocks = 2272,
  kFileAccessedServiceWorker = 2273,
  kFileAccessedSessionStorage = 2274,
  kFileAccessedSharedWorker = 2275,
  kV8MediaKeys_GetStatusForPolicy_Method = 2276,
  kV8DeoptimizerDisableSpeculation = 2277,
  kCSSSelectorCue = 2278,
  kCSSSelectorWebkitCalendarPickerIndicator = 2279,
  kCSSSelectorWebkitClearButton = 2280,
  kCSSSelectorWebkitColorSwatch = 2281,
  kCSSSelectorWebkitColorSwatchWrapper = 2282,
  kCSSSelectorWebkitDateAndTimeValue = 2283,
  kCSSSelectorWebkitDatetimeEdit = 2284,
  kCSSSelectorWebkitDatetimeEditAmpmField = 2285,
  kCSSSelectorWebkitDatetimeEditDayField = 2286,
  kCSSSelectorWebkitDatetimeEditFieldsWrapper = 2287,
  kCSSSelectorWebkitDatetimeEditHourField = 2288,
  kCSSSelectorWebkitDatetimeEditMillisecondField = 2289,
  kCSSSelectorWebkitDatetimeEditMinuteField = 2290,
  kCSSSelectorWebkitDatetimeEditMonthField = 2291,
  kCSSSelectorWebkitDatetimeEditSecondField = 2292,
  kCSSSelectorWebkitDatetimeEditText = 2293,
  kCSSSelectorWebkitDatetimeEditWeekField = 2294,
  kCSSSelectorWebkitDatetimeEditYearField = 2295,
  kCSSSelectorWebkitDetailsMarker = 2296,
  kCSSSelectorWebkitFileUploadButton = 2297,
  kCSSSelectorWebkitInnerSpinButton = 2298,
  kCSSSelectorWebkitInputPlaceholder = 2299,
  kCSSSelectorWebkitMediaSliderContainer = 2300,
  kCSSSelectorWebkitMediaSliderThumb = 2301,
  kCSSSelectorWebkitMediaTextTrackContainer = 2302,
  kCSSSelectorWebkitMediaTextTrackDisplay = 2303,
  kCSSSelectorWebkitMediaTextTrackRegion = 2304,
  kCSSSelectorWebkitMediaTextTrackRegionContainer = 2305,
  kCSSSelectorWebkitMeterBar = 2306,
  kCSSSelectorWebkitMeterEvenLessGoodValue = 2307,
  kCSSSelectorWebkitMeterInnerElement = 2308,
  kCSSSelectorWebkitMeterOptimumValue = 2309,
  kCSSSelectorWebkitMeterSuboptimumValue = 2310,
  kCSSSelectorWebkitProgressBar = 2311,
  kCSSSelectorWebkitProgressInnerElement = 2312,
  kCSSSelectorWebkitProgressValue = 2313,
  kCSSSelectorWebkitSearchCancelButton = 2314,
  kCSSSelectorWebkitSliderContainer = 2315,
  kCSSSelectorWebkitSliderRunnableTrack = 2316,
  kCSSSelectorWebkitSliderThumb = 2317,
  kCSSSelectorWebkitTextfieldDecorationContainer = 2318,
  kCSSSelectorWebkitUnknownPseudo = 2319,
  kFilterAsContainingBlockMayChangeOutput = 2320,
  kDispatchMouseUpDownEventOnDisabledFormControl = 2321,
  kCSSSelectorPseudoMatches = 2322,
  kV8RTCRtpSender_ReplaceTrack_Method = 2323,
  kInputTypeFileSecureOriginOpenChooser = 2324,
  kInputTypeFileInsecureOriginOpenChooser = 2325,
  kBasicShapeEllipseNoRadius = 2326,
  kBasicShapeEllipseOneRadius = 2327,
  kBasicShapeEllipseTwoRadius = 2328,
  kTemporalInputTypeChooserByTrustedClick = 2329,
  kTemporalInputTypeChooserByUntrustedClick = 2330,
  kTemporalInputTypeIgnoreUntrustedClick = 2331,
  kColorInputTypeChooserByTrustedClick = 2332,
  kColorInputTypeChooserByUntrustedClick = 2333,
  kCSSTypedOMStylePropertyMap = 2334,
  kScrollToFragmentRequested = 2335,
  kScrollToFragmentSucceedWithRaw = 2336,
  kScrollToFragmentSucceedWithASCII = 2337,
  kScrollToFragmentSucceedWithUTF8 = 2338,
  kScrollToFragmentSucceedWithIsomorphic = 2339,
  kScrollToFragmentFailWithASCII = 2341,
  kScrollToFragmentFailWithUTF8 = 2342,
  kScrollToFragmentFailWithIsomorphic = 2343,
  kScrollToFragmentFailWithInvalidEncoding = 2345,
  kRTCPeerConnectionWithActiveCsp = 2346,
  // The above items are available as of the M65 branch.

  kImageDecodingAttribute = 2347,
  kImageDecodeAPI = 2348,
  kV8HTMLElement_Autocapitalize_AttributeGetter = 2349,
  kV8HTMLElement_Autocapitalize_AttributeSetter = 2350,
  kCSSLegacyAlignment = 2351,
  kSRISignatureCheck = 2352,
  kSRISignatureSuccess = 2353,
  kCSSBasicShape = 2354,
  kCSSGradient = 2355,
  kCSSPaintFunction = 2356,
  kWebkitCrossFade = 2357,
  kDisablePictureInPictureAttribute = 2358,
  kCertificateTransparencyNonCompliantSubresourceInMainFrame = 2359,
  kCertificateTransparencyNonCompliantResourceInSubframe = 2360,
  kV8AbortController_Constructor = 2361,
  kReplaceCharsetInXHRIgnoringCase = 2362,
  kHTMLIFrameElementGestureMedia = 2363,
  kWorkletAddModule = 2364,
  kAnimationWorkletRegisterAnimator = 2365,
  kWorkletAnimationConstructor = 2366,
  kScrollTimelineConstructor = 2367,
  kAsyncClipboardAPIRead = 2369,
  kAsyncClipboardAPIWrite = 2370,
  kAsyncClipboardAPIReadText = 2371,
  kAsyncClipboardAPIWriteText = 2372,
  kOpenerNavigationWithoutGesture = 2373,
  kGetComputedStyleWebkitAppearance = 2374,
  kV8LockManager_Request_Method = 2375,
  kV8LockManager_Query_Method = 2376,
  kUserMediaEnableExperimentalHardwareEchoCancellation = 2377,
  kV8RTCDTMFSender_Track_AttributeGetter = 2378,
  kV8RTCDTMFSender_Duration_AttributeGetter = 2379,
  kV8RTCDTMFSender_InterToneGap_AttributeGetter = 2380,
  kV8RTCRtpSender_Dtmf_AttributeGetter = 2381,
  kRTCConstraintEnableDtlsSrtpTrue = 2382,
  kRTCConstraintEnableDtlsSrtpFalse = 2383,
  kRtcPeerConnectionId = 2384,
  kV8PaintWorkletGlobalScope_RegisterPaint_Method = 2385,
  kV8PaintWorkletGlobalScope_DevicePixelRatio_AttributeGetter = 2386,
  kCSSSelectorPseudoFocus = 2387,
  kCSSSelectorPseudoFocusVisible = 2388,
  kDistrustedLegacySymantecSubresource = 2389,
  kVRDisplayGetFrameData = 2390,
  kXMLHttpRequestResponseXML = 2391,
  kMessagePortTransferClosedPort = 2392,
  kRTCLocalSdpModification = 2393,
  kKeyboardApiLock = 2394,
  kKeyboardApiUnlock = 2395,
  kPPAPIURLRequestStreamToFile = 2396,
  kPaymentHandler = 2397,
  kPaymentRequestShowWithoutGesture = 2398,
  kReadableStreamConstructor = 2399,
  kWritableStreamConstructor = 2400,
  kTransformStreamConstructor = 2401,
  kNegativeBackgroundSize = 2402,
  kNegativeMaskSize = 2403,
  kClientHintsRtt = 2404,
  kClientHintsDownlink = 2405,
  kClientHintsEct = 2406,
  kCrossOriginHTMLIFrameElementContentDocument = 2407,
  kCrossOriginHTMLIFrameElementGetSVGDocument = 2408,
  kCrossOriginHTMLEmbedElementGetSVGDocument = 2409,
  kCrossOriginHTMLFrameElementContentDocument = 2410,
  kCrossOriginHTMLObjectElementContentDocument = 2411,
  kCrossOriginHTMLObjectElementGetSVGDocument = 2412,
  kNavigatorXR = 2413,
  kXRRequestDevice = 2414,
  kXRRequestSession = 2415,
  kXRSupportsSession = 2416,
  kXRSessionGetInputSources = 2417,
  kCSSResizeAuto = 2418,
  kPrefixedCursorGrab = 2419,
  kPrefixedCursorGrabbing = 2420,
  kCredentialManagerCreatePublicKeyCredential = 2421,
  kCredentialManagerGetPublicKeyCredential = 2422,
  kCredentialManagerMakePublicKeyCredentialSuccess = 2423,
  kCredentialManagerGetPublicKeyCredentialSuccess = 2424,
  kShapeOutsideContentBox = 2425,
  kShapeOutsidePaddingBox = 2426,
  kShapeOutsideBorderBox = 2427,
  kShapeOutsideMarginBox = 2428,
  kPerformanceTimeline = 2429,
  kUserTiming = 2430,
  kCSSSelectorPseudoIS = 2431,
  kKeyboardApiGetLayoutMap = 2432,
  kPerformanceResourceTimingInitiatorType = 2434,
  kV8ArraySortNoElementsProtector = 2436,
  kV8ArrayPrototypeSortJSArrayModifiedPrototype = 2437,
  kV8Document_PictureInPictureEnabled_AttributeGetter = 2438,
  kV8Document_PictureInPictureElement_AttributeGetter = 2439,
  kV8Document_ExitPictureInPicture_Method = 2440,
  kV8ShadowRoot_PictureInPictureElement_AttributeGetter = 2441,
  kV8HTMLVideoElement_DisablePictureInPicture_AttributeGetter = 2442,
  kV8HTMLVideoElement_DisablePictureInPicture_AttributeSetter = 2443,
  kV8HTMLVideoElement_RequestPictureInPicture_Method = 2444,
  kEnterPictureInPictureEventListener = 2445,
  kLeavePictureInPictureEventListener = 2446,
  kV8PictureInPictureWindow_Height_AttributeGetter = 2447,
  kV8PictureInPictureWindow_Width_AttributeGetter = 2448,
  kPictureInPictureWindowResizeEventListener = 2449,
  kV8CookieStore_Delete_Method = 2450,
  kV8CookieStore_Get_Method = 2451,
  kV8CookieStore_GetAll_Method = 2452,
  kV8CookieStore_GetChangeSubscriptions_Method = 2453,
  kV8CookieStore_Has_Method = 2454,
  kV8CookieStore_Set_Method = 2455,
  kV8CookieStore_SubscribeToChanges_Method = 2456,
  kV8CookieChangeEvent_Changed_AttributeGetter = 2457,
  kV8CookieChangeEvent_Deleted_AttributeGetter = 2458,
  kV8ExtendableCookieChangeEvent_Changed_AttributeGetter = 2459,
  kV8ExtendableCookieChangeEvent_Deleted_AttributeGetter = 2460,
  kShapeOutsideContentBoxDifferentFromMarginBox = 2461,
  kShapeOutsidePaddingBoxDifferentFromMarginBox = 2462,
  kCSSContainLayoutPositionedDescendants = 2463,
  kCanvasConvertToBlob = 2465,
  kPolymerV1Detected = 2466,
  kPolymerV2Detected = 2467,
  kPerformanceEventTimingBuffer = 2468,
  kPerformanceEventTimingConstructor = 2469,
  kReverseIterateDOMStorage = 2470,
  kTextToSpeech_Speak = 2471,
  kTextToSpeech_SpeakCrossOrigin = 2472,
  kTextToSpeech_SpeakDisallowedByAutoplay = 2473,
  kStaleWhileRevalidateEnabled = 2474,
  kMediaElementSourceOnOfflineContext = 2475,
  kMediaStreamDestinationOnOfflineContext = 2476,
  kMediaStreamSourceOnOfflineContext = 2477,
  kRTCDataChannelInitMaxRetransmitTime = 2478,
  kRTCPeerConnectionCreateDataChannelMaxPacketLifeTime = 2479,
  kV8SpeechGrammarList_AddFromUri_Method = 2480,
  kV8SpeechRecognitionEvent_Interpretation_AttributeGetter = 2481,
  kV8SpeechRecognitionEvent_Emma_AttributeGetter = 2482,
  kV8SpeechSynthesis_Speak_Method = 2483,
  kLegacySymantecCertMainFrameResource = 2484,
  kLegacySymantecCertInSubresource = 2485,
  kLegacySymantecCertInSubframeMainResource = 2486,
  kEventTimingExplicitlyRequested = 2487,
  kCSSEnvironmentVariable = 2488,
  kCSSEnvironmentVariable_SafeAreaInsetTop = 2489,
  kCSSEnvironmentVariable_SafeAreaInsetLeft = 2490,
  kCSSEnvironmentVariable_SafeAreaInsetBottom = 2491,
  kCSSEnvironmentVariable_SafeAreaInsetRight = 2492,
  kMediaControlsDisplayCutoutGesture = 2493,
  kDocumentOpenTwoArgs = 2494,
  kDocumentOpenTwoArgsWithReplace = 2495,
  kDocumentOpenThreeArgs = 2496,
  kV8FunctionTokenOffsetTooLongForToString = 2497,
  kServiceWorkerImportScriptNotInstalled = 2498,
  kNestedDedicatedWorker = 2499,
  kClientHintsMetaAcceptCHLifetime = 2500,
  kDOMNodeRemovedEventDelayed = 2501,
  kDOMNodeRemovedEventHandlerAccessDetachingNode = 2502,
  kDOMNodeRemovedEventListenedAtNonTarget = 2503,
  kDOMNodeRemovedFromDocumentEventDelayed = 2504,
  kDOMNodeRemovedFromDocumentEventHandlerAccessDetachingNode = 2505,
  kDOMNodeRemovedFromDocumentEventListenedAtNonTarget = 2506,
  kCSSFillAvailableLogicalWidth = 2507,
  kCSSFillAvailableLogicalHeight = 2508,
  kPopupOpenWhileFileChooserOpened = 2509,
  kCookieStoreAPI = 2510,
  kFeaturePolicyJSAPI = 2511,
  kV8RTCPeerConnection_GetTransceivers_Method = 2512,
  kV8RTCPeerConnection_AddTransceiver_Method = 2513,
  kV8RTCRtpTransceiver_Direction_AttributeGetter = 2514,
  kV8RTCRtpTransceiver_Direction_AttributeSetter = 2515,
  kHTMLLinkElementDisabledByParser = 2516,
  kRequestIsHistoryNavigation = 2517,
  kAddDocumentLevelPassiveTrueWheelEventListener = 2518,
  kAddDocumentLevelPassiveFalseWheelEventListener = 2519,
  kAddDocumentLevelPassiveDefaultWheelEventListener = 2520,
  kDocumentLevelPassiveDefaultEventListenerPreventedWheel = 2521,
  kShapeDetectionAPI = 2522,
  kV8SourceBuffer_ChangeType_Method = 2523,
  kPPAPIWebSocket = 2524,
  kV8MediaStreamTrack_ContentHint_AttributeGetter = 2525,
  kV8MediaStreamTrack_ContentHint_AttributeSetter = 2526,
  kV8IDBFactory_Open_Method = 2527,
  kEvaluateScriptMovedBetweenDocuments = 2528,
  kReportingObserver = 2529,
  kDeprecationReport = 2530,
  kInterventionReport = 2531,
  kV8WasmSharedMemory = 2532,
  kV8WasmThreadOpcodes = 2533,
  kCacheStorageAddAllSuccessWithDuplicate = 2534,
  kLegendDelegateFocusOrAccessKey = 2535,
  kFeaturePolicyReport = 2536,

  // Add new features immediately above this line. Don't change assigned
  // numbers of any item, and don't reuse removed slots.
  // Also, run update_use_counter_feature_enum.py in
  // chromium/src/tools/metrics/histograms/ to update the UMA mapping.
  // TODO(dcheng): Fix https://crbug.com/742517 and use the autogenerated constants.
  kNumberOfFeatures,  // This enum value must be last.
};