Introduce WebMediaSession

content/renderer/media/android/webmediasession_android.h

Index: content/renderer/media/android/webmediasession_android.h
diff --git a/content/renderer/media/android/webmediasession_android.h b/content/renderer/media/android/webmediasession_android.h
new file mode 100644
index 0000000000000000000000000000000000000000..7fe037b7681fa5c4c9714983b2f7380b68ff4d2d
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+++ b/content/renderer/media/android/webmediasession_android.h
@@ -0,0 +1,26 @@
+// 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.
+
+#ifndef CONTENT_RENDERER_MEDIA_ANDROID_WEBMEDIASESSION_ANDROID_H_
+#define CONTENT_RENDERER_MEDIA_ANDROID_WEBMEDIASESSION_ANDROID_H_
+
+#include "base/macros.h"
+#include "third_party/WebKit/public/platform/modules/mediasession/WebMediaSession.h"
+
+namespace content {
+
+class WebMediaSessionAndroid : public blink::WebMediaSession {
+ public:
+  WebMediaSessionAndroid() = default;
+
+  void activate(blink::WebMediaSessionCommandCallback*) override;
+  void deactivate(blink::WebMediaSessionCommandCallback*) override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(WebMediaSessionAndroid);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_MEDIA_ANDROID_WEBMEDIASESSION_ANDROID_H_