Add srcObject attribute of type MediaStream to HTMLMediaElement.

third_party/WebKit/Source/modules/mediastream/HTMLMediaElementMediaStream.h

Index: third_party/WebKit/Source/modules/mediastream/HTMLMediaElementMediaStream.h
diff --git a/third_party/WebKit/Source/modules/mediastream/HTMLMediaElementMediaStream.h b/third_party/WebKit/Source/modules/mediastream/HTMLMediaElementMediaStream.h
new file mode 100644
index 0000000000000000000000000000000000000000..fc7093e42c6ffd3d21ee50facd14739eee6d5e56
--- /dev/null
+++ b/third_party/WebKit/Source/modules/mediastream/HTMLMediaElementMediaStream.h
@@ -0,0 +1,35 @@
+// 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.
+
+#ifndef HTMLMediaElementMediaStream_h
+#define HTMLMediaElementMediaStream_h
+
+#include "core/html/HTMLMediaElement.h"
+#include "modules/ModulesExport.h"
+#include "platform/Supplementable.h"
+#include "platform/heap/Handle.h"
+
+namespace blink {
+
+class MediaStream;
+
+class MODULES_EXPORT HTMLMediaElementMediaStream final : public NoBaseWillBeGarbageCollectedFinalized<HTMLMediaElementMediaStream>, public WillBeHeapSupplement<HTMLMediaElement> {
+    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(HTMLMediaElementMediaStream);
+    USING_FAST_MALLOC_WILL_BE_REMOVED(HTMLMediaElementMediaStream);
+public:
+    DECLARE_VIRTUAL_TRACE();
+    static MediaStream* srcObject(HTMLMediaElement&);
+    static void setSrcObject(HTMLMediaElement&, MediaStream*);
+
+private:
+    HTMLMediaElementMediaStream();
+    static HTMLMediaElementMediaStream& from(HTMLMediaElement&);
+    static const char* supplementName();
+
+    PersistentWillBeMember<MediaStream> m_srcObject;
+};
+
+} // namespace blink
+
+#endif