| // 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 "build/build_config.h" |
| #include "content/public/common/content_features.h" |
| |
| namespace features { |
| |
| // All features in alphabetical order. |
| |
| // 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}; |
| |
| // Enables asm.js to WebAssembly V8 backend. |
| // http://asmjs.org/spec/latest/ |
| const base::Feature kAsmJsToWebAssembly{"AsmJsToWebAssembly", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Enables async wheel events. |
| const base::Feature kAsyncWheelEvents{"AsyncWheelEvents", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // 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 browser side navigation (aka PlzNavigate). http://crbug.com/368813 |
| const base::Feature kBrowserSideNavigation{"browser-side-navigation", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Toggles whether the buggy RSA parser is used. |
| // |
| // TODO(davidben): Remove this after Chrome 61 is released to |
| // stable. https://crbug.com/735616. |
| const base::Feature kBuggyRSAParser{"BuggyRSAParser", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // If Canvas2D Image Chromium is allowed, this feature controls whether it is |
| // enabled. |
| const base::Feature kCanvas2DImageChromium { |
| "Canvas2DImageChromium", |
| #if defined(OS_MACOSX) || defined(OS_CHROMEOS) |
| base::FEATURE_ENABLED_BY_DEFAULT |
| #else |
| base::FEATURE_DISABLED_BY_DEFAULT |
| #endif |
| }; |
| |
| // Enabled decoding images asynchronously from raster in the renderer |
| // compositor. |
| const base::Feature kCheckerImaging{"CheckerImaging", |
| 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 handling touch events in compositor using impl side touch action |
| // knowledge. |
| const base::Feature kCompositorTouchAction{"CompositorTouchAction", |
| base::FEATURE_DISABLED_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 the Feature Policy framework for granting and removing access to |
| // other features through HTTP headers. |
| const base::Feature kFeaturePolicy{"FeaturePolicy", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Enables Fetch API keepalive timeout setting. |
| const base::Feature kFetchKeepaliveTimeoutSetting{ |
| "FetchKeepaliveTimeoutSetting", 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 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_DISABLED_BY_DEFAULT}; |
| |
| // Enables extended Gamepad API features like motion tracking and haptics. |
| const base::Feature kGamepadExtensions{"GamepadExtensions", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Causes the implementations of guests (inner WebContents) to use |
| // out-of-process iframes. |
| const base::Feature kGuestViewCrossProcessFrames{ |
| "GuestViewCrossProcessFrames", base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Enables BlinkGC heap compaction. |
| const base::Feature kHeapCompaction{"HeapCompaction", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Enable lazy initialization of the media controls. |
| const base::Feature kLazyInitializeMediaControls{ |
| "LazyInitializeMediaControls", base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Enables lazily parsing css properties for performance. |
| const base::Feature kLazyParseCSS{"LazyParseCSS", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Use Mojo IPC for resource loading. |
| const base::Feature kLoadingWithMojo{"LoadingWithMojo", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Enables the old algorithm for processing audio constraints in getUserMedia(). |
| const base::Feature kMediaStreamOldAudioConstraints{ |
| "MediaStreamOldAudioConstraints", base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Enables the memory coordinator. |
| // WARNING: |
| // The memory coordinator is not ready for use and enabling this may cause |
| // unexpected memory regression at this point. Please do not enable this. |
| const base::Feature kMemoryCoordinator { |
| "MemoryCoordinator", base::FEATURE_DISABLED_BY_DEFAULT |
| }; |
| |
| // Enables the network service. |
| const base::Feature kNetworkService{"NetworkService", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Kill switch for Web Notification content images. |
| const base::Feature kNotificationContentImage{"NotificationContentImage", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| // An experiment forcing events to be non-blocking when the main thread is |
| // deemed unresponsive. See crbug.com/599609. |
| const base::Feature kMainThreadBusyScrollIntervention{ |
| "MainThreadBusyScrollIntervention", base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Blob mojofication. |
| const base::Feature kMojoBlobs{"MojoBlobs", base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Mojo-based Input Event routing. |
| const base::Feature kMojoInputMessages{"MojoInputMessages", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Enables/disables hardware video encode acceleration using Mojo (falls back). |
| // TODO(mcasas): remove after https://crbug.com/736517 is closed. |
| const base::Feature kMojoVideoEncodeAccelerator { |
| "MojoVideoEncodeAccelerator", |
| #if defined(OS_MACOSX) |
| base::FEATURE_ENABLED_BY_DEFAULT |
| #else |
| base::FEATURE_DISABLED_BY_DEFAULT |
| #endif |
| }; |
| |
| // ES6 Modules. |
| const base::Feature kModuleScripts{"ModuleScripts", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // ES6 Modules dynamic imports. |
| const base::Feature kModuleScriptsDynamicImport{ |
| "ModuleScriptsDynamicImport", base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Resource fetch optimizations for workers. See crbug.com/443374 |
| const base::Feature kOffMainThreadFetch{"OffMainThreadFetch", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Origin Trials for controlling access to feature/API experiments. |
| const base::Feature kOriginTrials{"OriginTrials", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Out of Blink CORS |
| const base::Feature kOutOfBlinkCORS{"OutOfBlinkCORS", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Whether a download can be handled by parallel jobs. |
| const base::Feature kParallelDownloading{ |
| "ParallelDownloading", base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Whether document level event listeners should default 'passive' to true. |
| const base::Feature kPassiveDocumentEventListeners{ |
| "PassiveDocumentEventListeners", 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}; |
| |
| // 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 |
| }; |
| |
| // RAF aligned mouse input events support. |
| const base::Feature kRafAlignedMouseInputEvents{ |
| "RafAlignedMouseInput", base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // RAF aligned touch input events support. |
| const base::Feature kRafAlignedTouchInputEvents{ |
| "RafAlignedTouchInput", base::FEATURE_ENABLED_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 |
| }; |
| |
| // Throttle Blink's rendering pipeline based on frame visibility. |
| const base::Feature kRenderingPipelineThrottling{ |
| "RenderingPipelineThrottling", base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Collect renderer peak memory usage during page loads. |
| const base::Feature kReportRendererPeakMemoryStats{ |
| "ReportRendererPeakMemoryStats", base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Loading Dispatcher v0 support with ResourceLoadScheduler (crbug.com/729954). |
| const base::Feature kResourceLoadScheduler{"ResourceLoadScheduler", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Scrolls to compensate for layout movements (bit.ly/scroll-anchoring). |
| const base::Feature kScrollAnchoring{"ScrollAnchoring", |
| 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}; |
| |
| // Streaming installed scripts on starting service workers. |
| const base::Feature kServiceWorkerScriptStreaming{ |
| "ServiceWorkerScriptStreaming", base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // http://tc39.github.io/ecmascript_sharedmem/shmem.html |
| const base::Feature kSharedArrayBuffer{"SharedArrayBuffer", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // An experiment to require process isolation for the sign-in origin, |
| // https://accounts.google.com. Launch bug: https://crbug.com/739418. |
| const base::Feature kSignInProcessIsolation{"sign-in-process-isolation", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Alternative to switches::kSitePerProcess, for turning on full site isolation. |
| // Launch bug: https://crbug.com/739418. |
| const base::Feature kSitePerProcess{"site-per-process", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // An experiment for skipping compositing small scrollers. |
| const base::Feature kSkipCompositingSmallScrollers{ |
| "SkipCompositingSmallScrollers", base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Paint invalidation based on slimming paint. See https://goo.gl/eQczQW |
| const base::Feature kSlimmingPaintInvalidation{ |
| "SlimmingPaintInvalidation", 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}; |
| |
| // Groups all out-of-process iframes to a different process from the process of |
| // the top document. This is a performance isolation mode. Launch bug: |
| // https://crbug.com/595987. |
| const base::Feature kTopDocumentIsolation{"top-document-isolation", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Enables touchpad and wheel scroll latching. |
| const base::Feature kTouchpadAndWheelScrollLatching{ |
| "TouchpadAndWheelScrollLatching", base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // An experiment to turn off compositing for 2D transform & opacity animations. |
| const base::Feature kTurnOff2DAndOpacityCompositorAnimations{ |
| "TurnOff2DAndOpacityCompositorAnimations", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Use Feature Policy to gate the use of permission features like midi, |
| // geolocation, camera, microphone, etc. |
| const base::Feature kUseFeaturePolicyForPermissions{ |
| "UseFeaturePolicyForPermissions", base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Use MojoAudioOutputIPC and RenderFrameAudioOutputStreamFactory rather than |
| // AudioMessageFilter and AudioRendererHost. |
| const base::Feature kUseMojoAudioOutputStreamFactory{ |
| "UseMojoAudioOutputStreamFactory", base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Controls whether vibrate requires user gesture. |
| const base::Feature kVibrateRequiresUserGesture{ |
| "VibrateRequiresUserGesture", base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Enables VR UI. |
| const base::Feature kVrShell { |
| "VrShell", |
| #if defined(OS_ANDROID) |
| base::FEATURE_ENABLED_BY_DEFAULT |
| #else |
| base::FEATURE_DISABLED_BY_DEFAULT |
| #endif |
| }; |
| |
| // Enable WebAssembly structured cloning. |
| // http://webassembly.org/ |
| const base::Feature kWebAssembly{"WebAssembly", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Enable WebAssembly streamed compilation. |
| const base::Feature kWebAssemblyStreaming{"WebAssemblyStreaming", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Enable WebAssembly streamed compilation. |
| const base::Feature kWebAssemblyTrapHandler{"WebAssemblyTrapHandler", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Controls whether the WebAuthentication API is enabled: |
| // https://w3c.github.io/webauthn |
| const base::Feature kWebAuth{"WebAuthentication", |
| 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}; |
| |
| // 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}; |
| |
| // Use GpuMemoryBuffer backed VideoFrames in media streams. |
| const base::Feature kWebRtcUseGpuMemoryBufferVideoFrames{ |
| "WebRTC-UseGpuMemoryBufferVideoFrames", |
| base::FEATURE_DISABLED_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 |
| }; |
| |
| // 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_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}; |
| |
| // Enables/disables the Image Capture API. |
| const base::Feature kImageCaptureAPI{"ImageCaptureAPI", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| const base::Feature kKeepAliveRendererForKeepaliveRequests{ |
| "KeepAliveRendererForKeepaliveRequests", base::FEATURE_DISABLED_BY_DEFAULT}; |
| |
| // Enables WebVR experimental rendering optimizations. |
| const base::Feature kWebVRExperimentalRendering{ |
| "WebVRExperimentalRendering", 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 hiding incorrectly-sized frames while in fullscreen. |
| const base::Feature kHideIncorrectlySizedFullscreenFrames{ |
| "HideIncorrectlySizedFullscreenFrames", 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_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}; |
| |
| // Enables WebVR VSync-aligned render loop timing. |
| const base::Feature kWebVrVsyncAlign{"WebVrVsyncAlign", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| #endif // defined(OS_ANDROID) |
| |
| #if defined(OS_WIN) |
| // Emergency "off switch" for new Windows sandbox security mitigation, |
| // sandbox::MITIGATION_EXTENSION_POINT_DISABLE. |
| const base::Feature kWinSboxDisableExtensionPoints{ |
| "WinSboxDisableExtensionPoint", base::FEATURE_ENABLED_BY_DEFAULT}; |
| |
| // Emergency "off switch" for new Windows sandbox security mitigation, |
| // sandbox::MITIGATION_FORCE_MS_SIGNED_BINS. |
| const base::Feature kWinSboxForceMsSigned{"WinSboxForceMsSigned", |
| base::FEATURE_ENABLED_BY_DEFAULT}; |
| #endif // defined(OS_WIN) |
| |
| #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}; |
| |
| // The V2 sandbox on MacOS removes the unsandboed warmup phase and sandboxes the |
| // entire life of the process. |
| const base::Feature kMacV2Sandbox{"MacV2Sandbox", |
| base::FEATURE_DISABLED_BY_DEFAULT}; |
| #endif // defined(OS_MACOSX) |
| |
| bool IsMojoBlobsEnabled() { |
| return base::FeatureList::IsEnabled(features::kMojoBlobs) || |
| base::FeatureList::IsEnabled(features::kNetworkService); |
| } |
| |
| } // namespace features |