Implement MediaMetadata artwork in Blink

third_party/WebKit/Source/modules/modules.gypi

 {
   'includes': [
     '../core/core_generated.gypi',
     'modules_generated.gypi',
   ],
   'variables': {
     # Experimental hooks for embedder to provide extra IDL and source files.
     #
     # Note: this is not a supported API. If you rely on this, you will be broken
     # from time to time as the code generator changes in backward incompatible
@@ skipping 92 matching lines @@
       'indexeddb/IDBKeyRange.idl',
       'indexeddb/IDBObjectStore.idl',
       'indexeddb/IDBOpenDBRequest.idl',
       'indexeddb/IDBRequest.idl',
       'indexeddb/IDBTransaction.idl',
       'indexeddb/IDBVersionChangeEvent.idl',
       'installedapp/RelatedApplication.idl',
       'mediacapturefromelement/CanvasCaptureMediaStreamTrack.idl',
       'mediarecorder/BlobEvent.idl',
       'mediarecorder/MediaRecorder.idl',
+      'mediasession/MediaArtwork.idl',
       'mediasession/MediaMetadata.idl',
       'mediasession/MediaSession.idl',
       'mediasource/MediaSource.idl',
       'mediasource/SourceBuffer.idl',
       'mediasource/SourceBufferList.idl',
       'mediasource/TrackDefault.idl',
       'mediasource/TrackDefaultList.idl',
       'mediasource/VideoPlaybackQuality.idl',
       'mediastream/MediaDeviceInfo.idl',
       'mediastream/MediaDevices.idl',
@@ skipping 343 matching lines @@
       'encryptedmedia/MediaKeySystemConfiguration.idl',
       'encryptedmedia/MediaKeySystemMediaCapability.idl',
       'filesystem/FileSystemFlags.idl',
       'gamepad/GamepadEventInit.idl',
       'geolocation/PositionOptions.idl',
       'indexeddb/IDBIndexParameters.idl',
       'indexeddb/IDBObjectStoreParameters.idl',
       'indexeddb/IDBVersionChangeEventInit.idl',
       'mediarecorder/BlobEventInit.idl',
       'mediarecorder/MediaRecorderOptions.idl',
+      'mediasession/MediaArtworkInit.idl',
       'mediasession/MediaMetadataInit.idl',
       'mediastream/ConstrainBooleanParameters.idl',
       'mediastream/ConstrainDOMStringParameters.idl',
       'mediastream/ConstrainDoubleRange.idl',
       'mediastream/ConstrainLongRange.idl',
       'mediastream/DoubleRange.idl',
       'mediastream/LongRange.idl',
       'mediastream/MediaStreamConstraints.idl',
       'mediastream/MediaStreamEventInit.idl',
       'mediastream/MediaTrackConstraintSet.idl',
@@ skipping 116 matching lines @@
       '<(blink_modules_output_dir)/indexeddb/IDBIndexParameters.cpp',
       '<(blink_modules_output_dir)/indexeddb/IDBIndexParameters.h',
       '<(blink_modules_output_dir)/indexeddb/IDBObjectStoreParameters.cpp',
       '<(blink_modules_output_dir)/indexeddb/IDBObjectStoreParameters.h',
       '<(blink_modules_output_dir)/indexeddb/IDBVersionChangeEventInit.cpp',
       '<(blink_modules_output_dir)/indexeddb/IDBVersionChangeEventInit.h',
       '<(blink_modules_output_dir)/mediarecorder/BlobEventInit.cpp',
       '<(blink_modules_output_dir)/mediarecorder/BlobEventInit.h',
       '<(blink_modules_output_dir)/mediarecorder/MediaRecorderOptions.cpp',
       '<(blink_modules_output_dir)/mediarecorder/MediaRecorderOptions.h',
+      '<(blink_modules_output_dir)/mediasession/MediaArtworkInit.cpp',
+      '<(blink_modules_output_dir)/mediasession/MediaArtworkInit.h',
       '<(blink_modules_output_dir)/mediasession/MediaMetadataInit.cpp',
       '<(blink_modules_output_dir)/mediasession/MediaMetadataInit.h',
       '<(blink_modules_output_dir)/mediastream/ConstrainBooleanParameters.cpp',
       '<(blink_modules_output_dir)/mediastream/ConstrainBooleanParameters.h',
       '<(blink_modules_output_dir)/mediastream/ConstrainDOMStringParameters.cpp',
       '<(blink_modules_output_dir)/mediastream/ConstrainDOMStringParameters.h',
       '<(blink_modules_output_dir)/mediastream/ConstrainDoubleRange.cpp',
       '<(blink_modules_output_dir)/mediastream/ConstrainDoubleRange.h',
       '<(blink_modules_output_dir)/mediastream/ConstrainLongRange.cpp',
       '<(blink_modules_output_dir)/mediastream/ConstrainLongRange.h',
@@ skipping 572 matching lines @@
       'mediacapturefromelement/OnRequestCanvasDrawListener.cpp',
       'mediacapturefromelement/OnRequestCanvasDrawListener.h',
       'mediacapturefromelement/TimedCanvasDrawListener.cpp',
       'mediacapturefromelement/TimedCanvasDrawListener.h',
       'mediarecorder/BlobEvent.cpp',
       'mediarecorder/BlobEvent.h',
       'mediarecorder/MediaRecorder.cpp',
       'mediarecorder/MediaRecorder.h',
       'mediasession/HTMLMediaElementMediaSession.cpp',
       'mediasession/HTMLMediaElementMediaSession.h',
+      'mediasession/MediaArtwork.cpp',
+      'mediasession/MediaArtwork.h',
       'mediasession/MediaMetadata.cpp',
       'mediasession/MediaMetadata.h',
       'mediasession/MediaSession.cpp',
       'mediasession/MediaSession.h',
       'mediasession/MediaSessionError.cpp',
       'mediasession/MediaSessionError.h',
       'mediasource/HTMLVideoElementMediaSource.cpp',
       'mediasource/HTMLVideoElementMediaSource.h',
       'mediasource/MediaSource.cpp',
       'mediasource/MediaSource.h',
@@ skipping 781 matching lines @@
       'webaudio/ConvolverNodeTest.cpp',
       'webaudio/DynamicsCompressorNodeTest.cpp',
       'webaudio/ScriptProcessorNodeTest.cpp',
       'webaudio/StereoPannerNodeTest.cpp',
       'webdatabase/QuotaTrackerTest.cpp',
       'websockets/DOMWebSocketTest.cpp',
       'websockets/DocumentWebSocketChannelTest.cpp',
     ],
   },
 }