Start an empty interface OffScreenCanvas

third_party/WebKit/Source/core/core.gypi

 {
     'includes': [
         'core_generated.gypi',
     ],
     'variables': {
         # Files for which bindings (.cpp and .h files) will be generated
         'core_idl_files': [
             'animation/KeyframeEffect.idl',
             'animation/EffectModel.idl',
             'animation/AnimationEffectReadOnly.idl',
@@ skipping 210 matching lines @@
             'html/HTMLUnknownElement.idl',
             'html/ImageData.idl',
             'html/MediaError.idl',
             'html/MediaKeyError.idl',
             'html/MediaKeyEvent.idl',
             'html/RadioNodeList.idl',
             'html/TextMetrics.idl',
             'html/TimeRanges.idl',
             'html/ValidityState.idl',
             'html/VoidCallback.idl',
+            'html/canvas/OffScreenCanvas.idl',
             'html/track/AudioTrack.idl',
             'html/track/AudioTrackList.idl',
             'html/track/TextTrack.idl',
             'html/track/TextTrackCue.idl',
             'html/track/TextTrackCueList.idl',
             'html/track/TextTrackList.idl',
             'html/track/TrackEvent.idl',
             'html/track/VideoTrack.idl',
             'html/track/VideoTrackList.idl',
             'html/track/vtt/VTTCue.idl',
@@ skipping 177 matching lines @@
             'events/EventListener.idl',
             'events/NavigatorEvents.idl',
             'frame/NavigatorCPU.idl',
             'frame/NavigatorID.idl',
             'frame/NavigatorLanguage.idl',
             'frame/NavigatorOnLine.idl',
             'frame/NavigatorStorageUtils.idl',
             'frame/WindowBase64.idl',
             'frame/WindowEventHandlers.idl',
             'frame/WindowTimers.idl',
+            'html/canvas/ImageBitmapOffScreenCanvas.idl',
+            'html/canvas/HTMLCanvasElementOffScreenCanvas.idl',
+            'html/canvas/ImageBitmapRenderingContext.idl',
             'imagebitmap/ImageBitmapFactories.idl',
             'svg/SVGDocument.idl',
             'svg/SVGFilterPrimitiveStandardAttributes.idl',
             'svg/SVGFitToViewBox.idl',
             'svg/SVGTests.idl',
             'svg/SVGURIReference.idl',
             'svg/SVGZoomAndPan.idl',
             'timing/ConsoleMemory.idl',
             'timing/SharedWorkerPerformance.idl',
             'timing/WindowPerformance.idl',
@@ skipping 1199 matching lines @@
             'frame/TopControls.h',
             'frame/UseCounter.cpp',
             'frame/VisualViewport.cpp',
             'frame/VisualViewport.h',
             'frame/csp/CSPDirectiveList.cpp',
             'frame/csp/CSPSource.cpp',
             'frame/csp/CSPSourceList.cpp',
             'frame/csp/ContentSecurityPolicy.cpp',
             'frame/csp/MediaListDirective.cpp',
             'frame/csp/SourceListDirective.cpp',
+            'html/canvas/ImageBitmapOffScreenCanvas.cpp',
+            'html/canvas/ImageBitmapOffScreenCanvas.h',
+            'html/canvas/HTMLCanvasElementOffScreenCanvas.cpp',
+            'html/canvas/HTMLCanvasElementOffScreenCanvas.h',
+            'html/canvas/ImageBitmapRenderingContext.cpp',
+            'html/canvas/ImageBitmapRenderingContext.h',
             'imagebitmap/ImageBitmapFactories.cpp',
             'imagebitmap/ImageBitmapFactories.h',
             'imagebitmap/ImageBitmapSource.cpp',
             'imagebitmap/ImageBitmapSource.h',
             'inspector/AsyncCallChain.cpp',
             'inspector/AsyncCallChain.h',
             'inspector/AsyncCallTracker.cpp',
             'inspector/AsyncCallTracker.h',
             'inspector/AsyncOperationMap.h',
             'inspector/ConsoleAPITypes.h',
@@ skipping 1244 matching lines @@
             'html/WindowNameCollection.cpp',
             'html/WindowNameCollection.h',
             'html/canvas/CanvasAsyncBlobCreator.cpp',
             'html/canvas/CanvasAsyncBlobCreator.h',
             'html/canvas/CanvasFontCache.cpp',
             'html/canvas/CanvasFontCache.h',
             'html/canvas/CanvasImageSource.h',
             'html/canvas/CanvasRenderingContext.cpp',
             'html/canvas/CanvasRenderingContext.h',
             'html/canvas/CanvasRenderingContextFactory.h',
+            'html/canvas/OffScreenCanvas.cpp',
+            'html/canvas/OffScreenCanvas.h',
             'html/forms/BaseButtonInputType.cpp',
             'html/forms/BaseButtonInputType.h',
             'html/forms/BaseCheckableInputType.cpp',
             'html/forms/BaseCheckableInputType.h',
             'html/forms/BaseChooserOnlyDateAndTimeInputType.cpp',
             'html/forms/BaseChooserOnlyDateAndTimeInputType.h',
             'html/forms/BaseClickableWithKeyInputType.cpp',
             'html/forms/BaseClickableWithKeyInputType.h',
             'html/forms/BaseDateAndTimeInputType.cpp',
             'html/forms/BaseDateAndTimeInputType.h',
@@ skipping 1015 matching lines @@
             'style/SVGComputedStyleTest.cpp',
             'svg/SVGPathParserTest.cpp',
             'svg/UnsafeSVGAttributeSanitizationTest.cpp',
             'testing/PrivateScriptTestTest.cpp',
             'timing/MemoryInfoTest.cpp',
             'workers/WorkerThreadTest.cpp',
             'xml/parser/SharedBufferReaderTest.cpp',
         ],
     }
 }