| // Copyright 2015 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. |
| |
| #include "content/public/common/content_features.h" |
| #include "build/build_config.h" |
| |
| #if defined(OS_CHROMEOS) |
| #include "media/capture/video/chromeos/public/cros_features.h" |
| #endif |
| |
| namespace features { |
| |
| // All features in alphabetical order. |
| |
| // Enables the allowActivationDelegation attribute on iframes. |
| // https://www.chromestatus.com/features/6025124331388928 |
| const base::Feature kAllowActivationDelegationAttr{ |
| "AllowActivationDelegationAttr", base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Allows starting services without the browser process. |
| const base::Feature kAllowStartingServiceManagerOnly{ |
| "AllowStartingServiceManagerOnly", base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Enables content-initiated, main frame navigations to data URLs. |
| // TODO(meacer): Remove when the deprecation is complete. |
| // https://www.chromestatus.com/feature/5669602927312896 |
| const base::Feature kAllowContentInitiatedDataUrlNavigations{ |
| "AllowContentInitiatedDataUrlNavigations", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Accepts Origin-Signed HTTP Exchanges to be signed with certificates |
| // that do not have CanSignHttpExchangesDraft extension. |
| // TODO(https://crbug.com/862003): Remove when certificates with |
| // CanSignHttpExchangesDraft extension are available from trusted CAs. |
| const base::Feature kAllowSignedHTTPExchangeCertsWithoutExtension{ |
| "AllowSignedHTTPExchangeCertsWithoutExtension", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Creates audio output and input streams using the audio service. |
| const base::Feature kAudioServiceAudioStreams{ |
| "AudioServiceAudioStreams", base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Launches the audio service on the browser startup. |
| const base::Feature kAudioServiceLaunchOnStartup{ |
| "AudioServiceLaunchOnStartup", base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Runs the audio service in a separate process. |
| const base::Feature kAudioServiceOutOfProcess{ |
| "AudioServiceOutOfProcess", base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Enables await taking 1 tick on the microtask queue. |
| const base::Feature kAwaitOptimization{"AwaitOptimization", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Kill switch for Background Fetch. |
| const base::Feature kBackgroundFetch{"BackgroundFetch", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Enable using the BackForwardCache. |
| const base::Feature kBackForwardCache{"BackForwardCache", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Enable incremental marking for Blink's heap managed by the Oilpan garbage |
| // collector. |
| const base::Feature kBlinkHeapIncrementalMarking{ |
| "BlinkHeapIncrementalMarking", base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Enable unified garbage collection in Blink. |
| const base::Feature kBlinkHeapUnifiedGarbageCollection{ |
| "BlinkHeapUnifiedGarbageCollection", base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Enable bloated renderer detection. |
| const base::Feature kBloatedRendererDetection{ |
| "BloatedRendererDetection", base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Allows swipe left/right from touchpad change browser navigation. Currently |
| // only enabled by default on CrOS. |
| const base::Feature kTouchpadOverscrollHistoryNavigation { |
| "TouchpadOverscrollHistoryNavigation", |
| #if defined(OS_CHROMEOS) || defined(OS_WIN) |
| base::FEATURE_ENABLED_BY_DEFAULT |
| #else |
| base::FEATURE_DISABLED_BY_DEFAULT |
| #endif |
| }; |
| |
| // Block subresource requests whose URLs contain embedded credentials (e.g. |
| // `https://user:pass@example.com/resource`). |
| const base::Feature kBlockCredentialedSubresources{ |
| "BlockCredentialedSubresources", base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Enables brotli "Accept-Encoding" advertising and "Content-Encoding" support. |
| // Brotli format specification: http://www.ietf.org/id/draft-alakuijala-brotli |
| const base::Feature kBrotliEncoding{"brotli-encoding", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Enables code caching for inline scripts. |
| const base::Feature kCacheInlineScriptCode{"CacheInlineScriptCode", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // If Canvas2D Image Chromium is allowed, this feature controls whether it is |
| // enabled. |
| const base::Feature kCanvas2DImageChromium { |
| "Canvas2DImageChromium", |
| #if defined(OS_MACOSX) |
| base::FEATURE_ENABLED_BY_DEFAULT |
| #else |
| base::FEATURE_DISABLED_BY_DEFAULT |
| #endif |
| }; |
| |
| // When CollectLiveNonNodeWrappers is enabled, live non-Node wrappers that are |
| // re-creatable will get collected by V8's minor garbage collector. |
| const base::Feature kCollectLiveNonNodeWrappers{ |
| "CollectLiveNonNodeWrappers", base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Enables the compositing of fixed position content that is opaque and can |
| // preserve LCD text. |
| const base::Feature kCompositeOpaqueFixedPosition{ |
| "CompositeOpaqueFixedPosition", base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Enables the compositing of scrolling content that supports painting the |
| // background with the foreground, such that LCD text will still be enabled. |
| const base::Feature kCompositeOpaqueScrollers{"CompositeOpaqueScrollers", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Enables crash reporting via Reporting API. |
| // https://www.w3.org/TR/reporting/#crash-report |
| const base::Feature kCrashReporting{"CrashReporting", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Enables specification of a target element in the fragment identifier |
| // via a CSS selector. |
| const base::Feature kCSSFragmentIdentifiers{"CSSFragmentIdentifiers", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Puts save-data header in the holdback mode. This disables sending of |
| // save-data header to origins, and to the renderer processes within Chrome. |
| const base::Feature kDataSaverHoldback{"DataSaverHoldback", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Enable changing source dynamically for desktop capture. |
| const base::Feature kDesktopCaptureChangeSource{ |
| "DesktopCaptureChangeSource", base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Throttle tasks in Blink background timer queues based on CPU budgets |
| // for the background tab. Bug: https://crbug.com/639852. |
| const base::Feature kExpensiveBackgroundTimerThrottling{ |
| "ExpensiveBackgroundTimerThrottling", base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Enables exposing back/forward mouse buttons to the renderer and the web. |
| const base::Feature kExtendedMouseButtons{"ExtendedMouseButtons", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Enables a blink::FontCache optimization that reuses a font to serve different |
| // size of font. |
| const base::Feature kFontCacheScaling{"FontCacheScaling", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Enables fixes for matching src: local() for web fonts correctly against full |
| // font name or postscript name. Rolling out behind a flag, as enabling this |
| // enables a font indexer on Android which we need to test in the field first. |
| const base::Feature kFontSrcLocalMatching{"FontSrcLocalMatching", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Enables a security restriction on iframes navigating their top frame. |
| // When enabled, the navigation will only be permitted if the iframe is |
| // same-origin to the top frame, or if a user gesture is being processed. |
| const base::Feature kFramebustingNeedsSameOriginOrUserGesture{ |
| "FramebustingNeedsSameOriginOrUserGesture", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Enables haptic vibration effects on supported gamepads. |
| const base::Feature kGamepadVibration{"GamepadVibration", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Puts network quality estimate related Web APIs in the holdback mode. When the |
| // holdback is enabled the related Web APIs return network quality estimate |
| // set by the experiment (regardless of the actual quality). |
| const base::Feature kNetworkQualityEstimatorWebHoldback{ |
| "NetworkQualityEstimatorWebHoldback", base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // When WebXR Device API is enabled, exposes VR controllers as Gamepads and |
| // enables additional Gamepad attributes for use with WebXR Device API. Each |
| // XRInputSource will have a corresponding Gamepad instance. |
| const base::Feature kWebXrGamepadSupport{"WebXRGamepadSupport", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Causes the implementations of guests (inner WebContents) to use |
| // out-of-process iframes. |
| // TODO(533069): Remove once BrowserPlugin is removed. |
| const base::Feature kGuestViewCrossProcessFrames{ |
| "GuestViewCrossProcessFrames", base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Enables BlinkGC heap compaction. |
| const base::Feature kHeapCompaction{"HeapCompaction", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // If a page does a client side redirect or adds to the history without a user |
| // gesture, then skip it on back/forward UI. |
| const base::Feature kHistoryManipulationIntervention{ |
| "HistoryManipulationIntervention", base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Enables/disables the Image Capture API. |
| const base::Feature kImageCaptureAPI{"ImageCaptureAPI", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // This flag is used to set field parameters to choose predictor we use when |
| // kResamplingInputEvents is disabled. It's used for gatherig accuracy metrics |
| // on finch and also for choosing predictor type for predictedEvents API without |
| // enabling resampling. It does not have any effect when the resampling flag is |
| // enabled. |
| const base::Feature kInputPredictorTypeChoice{ |
| "InputPredictorTypeChoice", base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Alternative to switches::kIsolateOrigins, for turning on origin isolation. |
| // List of origins to isolate has to be specified via |
| // kIsolateOriginsFieldTrialParamName. |
| const base::Feature kIsolateOrigins{"IsolateOrigins", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| const char kIsolateOriginsFieldTrialParamName[] = "OriginsList"; |
| |
| // Enables an API which allows websites to capture reserved keys in fullscreen. |
| // Defined by w3c here: https://w3c.github.io/keyboard-lock/ |
| const base::Feature kKeyboardLockAPI{"KeyboardLockAPI", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| const base::Feature kLayeredAPI{"LayeredAPI", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| const base::Feature kLazyFrameLoading{"LazyFrameLoading", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| const base::Feature kLazyFrameVisibleLoadTimeMetrics{ |
| "LazyFrameVisibleLoadTimeMetrics", base::FEATURE_DISABLED_BY_DEFAULT}; |
| const base::Feature kLazyImageLoading{"LazyImageLoading", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| const base::Feature kLazyImageVisibleLoadTimeMetrics{ |
| "LazyImageVisibleLoadTimeMetrics", base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Enable lazy initialization of the media controls. |
| const base::Feature kLazyInitializeMediaControls{ |
| "LazyInitializeMediaControls", base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Enables lowering the priority of the resources in iframes. |
| const base::Feature kLowPriorityIframes{"LowPriorityIframes", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // If this feature is enabled, media-device enumerations use a cache that is |
| // invalidated upon notifications sent by base::SystemMonitor. If disabled, the |
| // cache is considered invalid on every enumeration request. |
| const base::Feature kMediaDevicesSystemMonitorCache { |
| "MediaDevicesSystemMonitorCaching", |
| #if defined(OS_MACOSX) || defined(OS_WIN) |
| base::FEATURE_ENABLED_BY_DEFAULT |
| #else |
| base::FEATURE_DISABLED_BY_DEFAULT |
| #endif |
| }; |
| |
| // Instead of BrowserPlugin or GuestViews, MimeHandlerView will use a cross |
| // process frame to render its handler. |
| const base::Feature kMimeHandlerViewInCrossProcessFrame{ |
| "MimeHandlerViewInCrossProcessFrame", base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Enables/disables the video capture service. |
| const base::Feature kMojoVideoCapture { |
| "MojoVideoCapture", |
| #if defined(OS_MACOSX) || defined(OS_WIN) || defined(OS_CHROMEOS) |
| base::FEATURE_ENABLED_BY_DEFAULT |
| #else |
| base::FEATURE_DISABLED_BY_DEFAULT |
| #endif |
| }; |
| |
| // A secondary switch used in combination with kMojoVideoCapture. |
| // This is intended as a kill switch to allow disabling the service on |
| // particular groups of devices even if they forcibly enable kMojoVideoCapture |
| // via a command-line argument. |
| const base::Feature kMojoVideoCaptureSecondary{ |
| "MojoVideoCaptureSecondary", base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // If the network service is enabled, runs it in process. |
| const base::Feature kNetworkServiceInProcess{"NetworkServiceInProcess", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Kill switch for Web Notification content images. |
| const base::Feature kNotificationContentImage{"NotificationContentImage", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Origin Policy. See https://crbug.com/751996 |
| const base::Feature kOriginPolicy{"OriginPolicy", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Origin Trials for controlling access to feature/API experiments. |
| const base::Feature kOriginTrials{"OriginTrials", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // History navigation in response to horizontal overscroll (aka gesture-nav). |
| const base::Feature kOverscrollHistoryNavigation{ |
| "OverscrollHistoryNavigation", base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Blink PageLifecycle feature. See https://crbug.com/775194 |
| const base::Feature kPageLifecycle{"PageLifecycle", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Whether document level event listeners should default 'passive' to true. |
| const base::Feature kPassiveDocumentEventListeners{ |
| "PassiveDocumentEventListeners", base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Whether document level wheel and mousewheel event listeners should default |
| // 'passive' to true. |
| const base::Feature kPassiveDocumentWheelEventListeners{ |
| "PassiveDocumentWheelEventListeners", base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Whether we should force a touchstart and first touchmove per scroll event |
| // listeners to be non-blocking during fling. |
| const base::Feature kPassiveEventListenersDueToFling{ |
| "PassiveEventListenersDueToFling", base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Whether PaymentRequest exposes hasEnrolledInstrument API. |
| const base::Feature kPaymentRequestHasEnrolledInstrument = { |
| "PaymentRequestHasEnrolledInstrument", base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Whether PDF files should be rendered in diffent processes based on origin. |
| const base::Feature kPdfIsolation = {"PdfIsolation", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Whether we should use the navigation_client mojo interface for navigations. |
| const base::Feature kPerNavigationMojoInterface = { |
| "PerNavigationMojoInterface", base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // If Pepper 3D Image Chromium is allowed, this feature controls whether it is |
| // enabled. |
| const base::Feature kPepper3DImageChromium { |
| "Pepper3DImageChromium", |
| #if defined(OS_MACOSX) |
| base::FEATURE_ENABLED_BY_DEFAULT |
| #else |
| base::FEATURE_DISABLED_BY_DEFAULT |
| #endif |
| }; |
| |
| // Whether cross-site frames should get their own SiteInstance even when |
| // strict site isolation is disabled. These SiteInstances will still be |
| // grouped into a shared default process based on BrowsingInstance. |
| const base::Feature kProcessSharingWithStrictSiteInstances{ |
| "ProcessSharingWithStrictSiteInstances", base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Enables Purge+Throttle on platforms except Android and MacOS. |
| // (Android) Purge+Throttle depends on TabManager, but TabManager doesn't |
| // support Android. Enable after Android is supported. |
| // (MacOS X) Enable after Purge+Throttle handles memory pressure signals |
| // send by OS correctly. |
| const base::Feature kPurgeAndSuspend { |
| "PurgeAndSuspend", |
| #if defined(OS_MACOSX) || defined(OS_ANDROID) |
| base::FEATURE_DISABLED_BY_DEFAULT |
| #else |
| base::FEATURE_ENABLED_BY_DEFAULT |
| #endif |
| }; |
| |
| // Enable raster-inducing scroll. |
| const base::Feature kRasterInducingScroll{"RasterInducingScroll", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Throttle Blink's rendering pipeline based on frame visibility. |
| const base::Feature kRenderingPipelineThrottling{ |
| "RenderingPipelineThrottling", base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Enables resampling input events on main thread. |
| const base::Feature kResamplingInputEvents{"ResamplingInputEvents", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Loading Dispatcher v0 support with ResourceLoadScheduler (crbug.com/729954). |
| const base::Feature kResourceLoadScheduler{"ResourceLoadScheduler", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Run video capture service in the Browser process as opposed to a dedicated |
| // utility process |
| const base::Feature kRunVideoCaptureServiceInBrowserProcess{ |
| "RunVideoCaptureServiceInBrowserProcess", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Save the scroll anchor and use it to restore scroll position. |
| const base::Feature kScrollAnchorSerialization{ |
| "ScrollAnchorSerialization", base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Make sendBeacon throw for a Blob with a non simple type. |
| const base::Feature kSendBeaconThrowForBlobWithNonSimpleType{ |
| "SendBeaconThrowForBlobWithNonSimpleType", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| const base::Feature kSecMetadata{"SecMetadata", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Enables long running message dispatch for service workers. |
| // This is a temporary addition only to be used for the Android Messages |
| // integration with ChromeOS (http://crbug.com/823256). |
| const base::Feature kServiceWorkerLongRunningMessage{ |
| "ServiceWorkerLongRunningMessage", base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Service worker based payment apps as defined by w3c here: |
| // https://w3c.github.io/webpayments-payment-apps-api/ |
| const base::Feature kServiceWorkerPaymentApps{"ServiceWorkerPaymentApps", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // http://tc39.github.io/ecmascript_sharedmem/shmem.html |
| const base::Feature kSharedArrayBuffer { |
| "SharedArrayBuffer", |
| #if defined(OS_ANDROID) |
| base::FEATURE_DISABLED_BY_DEFAULT |
| #else |
| base::FEATURE_ENABLED_BY_DEFAULT |
| #endif |
| }; |
| |
| // Origin-Signed HTTP Exchanges (for WebPackage Loading) |
| // https://www.chromestatus.com/features/5745285984681984 |
| const base::Feature kSignedHTTPExchange{"SignedHTTPExchange", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Send "Accept: application/signed-exchange" header to origins who opt-in. |
| const base::Feature kSignedHTTPExchangeAcceptHeader{ |
| "SignedHTTPExchangeAcceptHeader", base::FEATURE_DISABLED_BY_DEFAULT}; |
| // Field trial parameter containing the list of origins that opted-in to receive |
| // "Accept: application/signed-exchange" header. |
| const char kSignedHTTPExchangeAcceptHeaderFieldTrialParamName[] = "OriginsList"; |
| |
| // Origin Trial of Origin-Signed HTTP Exchanges (for WebPackage Loading) |
| const base::Feature kSignedHTTPExchangeOriginTrial{ |
| "SignedHTTPExchangeOriginTrial", base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Controls whether SpareRenderProcessHostManager tries to always have a warm |
| // spare renderer process around for the most recently requested BrowserContext. |
| // This feature is only consulted in site-per-process mode. |
| const base::Feature kSpareRendererForSitePerProcess{ |
| "SpareRendererForSitePerProcess", base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Throttle Blink timers in out-of-view cross origin frames. |
| const base::Feature kTimerThrottlingForHiddenFrames{ |
| "TimerThrottlingForHiddenFrames", base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Enables async touchpad pinch zoom events. We check the ACK of the first |
| // synthetic wheel event in a pinch sequence, then send the rest of the |
| // synthetic wheel events of the pinch sequence as non-blocking if the first |
| // event’s ACK is not canceled. |
| const base::Feature kTouchpadAsyncPinchEvents{"TouchpadAsyncPinchEvents", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Skips the passthrough touch event queue filter, ensuring that all touch |
| // events that reach the queue will be passed onto the renderer compositor |
| // process as long as the page hasn't timed out. |
| const base::Feature kSkipPassthroughTouchEventQueueFilter{ |
| "SkipPassthroughTouchEventQueueFilter", base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Allows user activation propagation to all frames having the same origin as |
| // the activation notifier frame. This is an intermediate measure before we |
| // have an iframe attribute to declaratively allow user activation propagation |
| // to subframes. |
| const base::Feature kUserActivationSameOriginVisibility{ |
| "UserActivationSameOriginVisibility", base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // An experimental simple user-activation model where the user gesture state is |
| // tracked through a frame-based state instead of the gesture tokens we use |
| // today. |
| const base::Feature kUserActivationV2{"UserActivationV2", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Enables V8's low memory mode for subframes. This is used only |
| // in conjunction with the --site-per-process feature. |
| const base::Feature kV8LowMemoryModeForSubframes{ |
| "V8LowMemoryModeForSubframes", base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Enables to use the V8 Orinoco garbage collector. |
| const base::Feature kV8Orinoco{"V8Orinoco", base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Enables future V8 VM features |
| const base::Feature kV8VmFuture{"V8VmFuture", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Enable WebAssembly structured cloning. |
| // http://webassembly.org/ |
| const base::Feature kWebAssembly{"WebAssembly", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Enable WebAssembly baseline compilation and tier up. |
| const base::Feature kWebAssemblyBaseline{"WebAssemblyBaseline", |
| #ifdef ARCH_CPU_X86_FAMILY |
| base::FEATURE_ENABLED_BY_DEFAULT |
| #else |
| base::FEATURE_DISABLED_BY_DEFAULT |
| #endif |
| }; |
| |
| // Enable WebAssembly threads. |
| // https://github.com/WebAssembly/threads |
| const base::Feature kWebAssemblyThreads{"WebAssemblyThreads", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Enable WebAssembly trap handler. |
| #if defined(OS_LINUX) && defined(ARCH_CPU_X86_64) |
| const base::Feature kWebAssemblyTrapHandler{"WebAssemblyTrapHandler", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| #else |
| const base::Feature kWebAssemblyTrapHandler{"WebAssemblyTrapHandler", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| #endif |
| |
| // Controls whether the visibility of a WebContents can be OCCLUDED. When |
| // disabled, an occluded WebContents behaves exactly like a VISIBLE WebContents. |
| const base::Feature kWebContentsOcclusion { |
| "WebContentsOcclusion", |
| #if defined(OS_MACOSX) || defined(OS_CHROMEOS) |
| base::FEATURE_ENABLED_BY_DEFAULT |
| #else |
| base::FEATURE_DISABLED_BY_DEFAULT |
| #endif |
| }; |
| |
| // Controls whether the WebAuthentication API is enabled: |
| // https://w3c.github.io/webauthn |
| const base::Feature kWebAuth { |
| "WebAuthentication", |
| base::FEATURE_ENABLED_BY_DEFAULT |
| }; |
| |
| // Controls whether BLE authenticators can be used via the WebAuthentication |
| // API. https://w3c.github.io/webauthn |
| const base::Feature kWebAuthBle{"WebAuthenticationBle", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Controls whether CTAP2 devices can communicate via the WebAuthentication API |
| // using pairingless BLE protocol. |
| // https://w3c.github.io/webauthn |
| const base::Feature kWebAuthCable{"WebAuthenticationCable", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Controls whether AuthenticatorAttestationResponse contains a getTransports |
| // member to return the set of transports supported by an authenticator. |
| const base::Feature kWebAuthGetTransports{"WebAuthenticationGetTransports", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // If WebGL Image Chromium is allowed, this feature controls whether it is |
| // enabled. |
| const base::Feature kWebGLImageChromium{"WebGLImageChromium", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Enable experimental policy-controlled features and LAPIs |
| const base::Feature kExperimentalProductivityFeatures{ |
| "ExperimentalProductivityFeatures", base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // The JavaScript API for payments on the web. |
| const base::Feature kWebPayments{"WebPayments", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Makes WebRTC use ECDSA certs by default (i.e., when no cert type was |
| // specified in JS). |
| const base::Feature kWebRtcEcdsaDefault{"WebRTC-EnableWebRtcEcdsa", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Enables HW H264 encoding on Android. |
| const base::Feature kWebRtcHWH264Encoding{"WebRtcHWH264Encoding", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Enables HW VP8 encoding on Android. |
| const base::Feature kWebRtcHWVP8Encoding { |
| "WebRtcHWVP8Encoding", |
| #if defined(OS_ANDROID) |
| base::FEATURE_DISABLED_BY_DEFAULT |
| #else |
| base::FEATURE_ENABLED_BY_DEFAULT |
| #endif |
| }; |
| |
| // Enables negotiation of experimental multiplex codec in SDP. |
| const base::Feature kWebRtcMultiplexCodec{"WebRTC-MultiplexCodec", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Fallback from hardware encoder (if available) to software, for WebRTC |
| // screensharing that uses temporal scalability. |
| const base::Feature kWebRtcScreenshareSwEncoding{ |
| "WebRtcScreenshareSwEncoding", base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Enables the WebRTC Echo Canceller version 3 (AEC3). Feature for |
| // http://crbug.com/688388. This value is sent to WebRTC's echo canceller to |
| // toggle which echo canceller should be used. |
| const base::Feature kWebRtcUseEchoCanceller3{"WebRtcUseEchoCanceller3", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Use GpuMemoryBuffer backed VideoFrames in media streams. |
| const base::Feature kWebRtcUseGpuMemoryBufferVideoFrames{ |
| "WebRTC-UseGpuMemoryBufferVideoFrames", base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Causes WebRTC to replace host ICE candidate IP addresses with generated |
| // names ending in ".local" and resolve them using mDNS. |
| // http://crbug.com/878465 |
| const base::Feature kWebRtcHideLocalIpsWithMdns{ |
| "WebRtcHideLocalIpsWithMdns", base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Controls whether the WebUSB API is enabled: |
| // https://wicg.github.io/webusb |
| const base::Feature kWebUsb{"WebUSB", base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Controls whether WebVR VSync-aligned render loop timing is enabled. |
| const base::Feature kWebVrVsyncAlign{"WebVrVsyncAlign", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Controls whether the WebXR Device API is enabled. |
| const base::Feature kWebXr{"WebXR", base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Enables access to raycasting against estimated XR scene geometry. |
| const base::Feature kWebXrHitTest{"WebXRHitTest", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Controls whether the orientation sensor based device is enabled. |
| const base::Feature kWebXrOrientationSensorDevice{ |
| "WebXROrientationSensorDevice", |
| #if defined(OS_ANDROID) |
| base::FEATURE_ENABLED_BY_DEFAULT |
| #else |
| base::FEATURE_DISABLED_BY_DEFAULT |
| #endif |
| }; |
| |
| // Wipe corrupt v2 IndexedDB databases. |
| const base::Feature kWipeCorruptV2IDBDatabases{ |
| "WipeCorruptV2IDBDatabases", base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Enabled scheduler use for script streaming. |
| const base::Feature kScheduledScriptStreaming{"ScheduledScriptStreaming", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Start streaming scripts on script preload. |
| const base::Feature kScriptStreamingOnPreload{ |
| "ScriptStreamingOnPreload", base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| #if defined(OS_ANDROID) |
| // Autofill Accessibility in Android. |
| // crbug.com/627860 |
| const base::Feature kAndroidAutofillAccessibility{ |
| "AndroidAutofillAccessibility", base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Enables developers to use the CSS safe-area-* and viewport-fit APIs which |
| // allow them to support devices with a display cutout. |
| const base::Feature kDisplayCutoutAPI{"DisplayCutoutAPI", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Enables hiding incorrectly-sized frames while in fullscreen. |
| const base::Feature kHideIncorrectlySizedFullscreenFrames{ |
| "HideIncorrectlySizedFullscreenFrames", base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Sets moderate binding to background renderers playing media, when enabled. |
| // Else the renderer will have strong binding. |
| const base::Feature kBackgroundMediaRendererHasModerateBinding{ |
| "BackgroundMediaRendererHasModerateBinding", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Controls whether the WebNFC API is enabled: |
| // https://w3c.github.io/web-nfc/ |
| const base::Feature kWebNfc{"WebNFC", base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Controls whether an override for the WebXR presentation render path is |
| // enabled. The param value specifies the requested specific render path. This |
| // is combined with a runtime capability check, the option is ignored if the |
| // requested render path is unsupported. |
| const base::Feature kWebXrRenderPath{"WebXrRenderPath", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| const char kWebXrRenderPathParamName[] = "RenderPath"; |
| const char kWebXrRenderPathParamValueClientWait[] = "ClientWait"; |
| const char kWebXrRenderPathParamValueGpuFence[] = "GpuFence"; |
| const char kWebXrRenderPathParamValueSharedBuffer[] = "SharedBuffer"; |
| #endif // defined(OS_ANDROID) |
| |
| #if !defined(OS_ANDROID) |
| // Makes all WebUI that uses Polymer use 2.x version. |
| // TODO(dpapad): Remove this once Polymer 2 migration is done, |
| // https://crbug.com/738611. |
| const base::Feature kWebUIPolymer2{"WebUIPolymer2", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| #endif // !defined(OS_ANDROID) |
| |
| #if defined(OS_CHROMEOS) |
| // If this flag is enabled, Web UI pages can call DisablePolymer2() on the |
| // shared resource during setup in order to use Polymer 1, regardless of the |
| // state of the WebUIPolymer2 flag. Note: Currently, this only supports one Web |
| // UI page disabling Polymer 2. |
| // TODO(dpapad): Remove this once Polymer 2 migration is done, |
| // https://crbug.com/738611. |
| const base::Feature kWebUIPolymer2Exceptions{"WebUIPolymer2Exceptions", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| #endif // defined(OS_CHROMEOS) |
| |
| #if defined(OS_MACOSX) |
| // Enables caching of media devices for the purpose of enumerating them. |
| const base::Feature kDeviceMonitorMac{"DeviceMonitorMac", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Enable IOSurface based screen capturer. |
| const base::Feature kIOSurfaceCapturer{"IOSurfaceCapturer", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| const base::Feature kMacV2GPUSandbox{"MacV2GPUSandbox", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| #endif // defined(OS_MACOSX) |
| |
| #if defined(WEBRTC_USE_PIPEWIRE) |
| // Controls whether the PipeWire support for screen capturing is enabled on the |
| // Wayland display server. |
| const base::Feature kWebRtcPipeWireCapturer{"WebRTCPipeWireCapturer", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| #endif // defined(WEBRTC_USE_PIPEWIRE) |
| |
| enum class VideoCaptureServiceConfiguration { |
| kEnabledForOutOfProcess, |
| kEnabledForBrowserProcess, |
| kDisabled |
| }; |
| |
| bool ShouldEnableVideoCaptureService() { |
| return base::FeatureList::IsEnabled(features::kMojoVideoCapture) && |
| base::FeatureList::IsEnabled(features::kMojoVideoCaptureSecondary); |
| } |
| |
| VideoCaptureServiceConfiguration GetVideoCaptureServiceConfiguration() { |
| if (!ShouldEnableVideoCaptureService()) |
| return VideoCaptureServiceConfiguration::kDisabled; |
| |
| #if defined(OS_ANDROID) |
| return VideoCaptureServiceConfiguration::kEnabledForBrowserProcess; |
| #elif defined(OS_CHROMEOS) |
| return media::ShouldUseCrosCameraService() |
| ? VideoCaptureServiceConfiguration::kEnabledForBrowserProcess |
| : VideoCaptureServiceConfiguration::kEnabledForOutOfProcess; |
| #else |
| return base::FeatureList::IsEnabled( |
| features::kRunVideoCaptureServiceInBrowserProcess) |
| ? VideoCaptureServiceConfiguration::kEnabledForBrowserProcess |
| : VideoCaptureServiceConfiguration::kEnabledForOutOfProcess; |
| #endif |
| } |
| |
| bool IsVideoCaptureServiceEnabledForOutOfProcess() { |
| return GetVideoCaptureServiceConfiguration() == |
| VideoCaptureServiceConfiguration::kEnabledForOutOfProcess; |
| } |
| |
| bool IsVideoCaptureServiceEnabledForBrowserProcess() { |
| return GetVideoCaptureServiceConfiguration() == |
| VideoCaptureServiceConfiguration::kEnabledForBrowserProcess; |
| } |
| |
| } // namespace features |