Implement MediaMetadata artwork in Blink

third_party/WebKit/Source/modules/mediasession/MediaArtwork.idl

Index: third_party/WebKit/Source/modules/mediasession/MediaArtwork.idl
diff --git a/third_party/WebKit/Source/modules/mediasession/MediaArtwork.idl b/third_party/WebKit/Source/modules/mediasession/MediaArtwork.idl
new file mode 100644
index 0000000000000000000000000000000000000000..edad4ef160b13a9cba91e899daa613ce7c30b270
--- /dev/null
+++ b/third_party/WebKit/Source/modules/mediasession/MediaArtwork.idl
@@ -0,0 +1,15 @@
+// Copyright 2016 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.
+
+// TODO(zqzhang): add link to the spec.

[haraken, 2016/06/09 11:17:44]

Don't we have a spec yet?

[Zhiqiang Zhang (Slow), 2016/06/09 15:30:13]

Added link to the spec change proposal.

+
+[
+    ConstructorCallWith=ExecutionContext,
+    Constructor(MediaArtworkInit artwork),
+    RuntimeEnabled=MediaSession,
+] interface MediaArtwork {
+  readonly attribute DOMString src;
+  readonly attribute DOMString sizes;
+  readonly attribute DOMString type;
+};