Media Session: passing metadata from renderer/ to browser/.

content/renderer/media/android/renderer_media_session_manager.h

Index: content/renderer/media/android/renderer_media_session_manager.h
diff --git a/content/renderer/media/android/renderer_media_session_manager.h b/content/renderer/media/android/renderer_media_session_manager.h
index c7f7504430a0a7a2a4a154de1cbaac072eabfcb5..5c5a2f2ba938f1c6df5fcd4bab3ab8388d231cae 100644
--- a/content/renderer/media/android/renderer_media_session_manager.h
+++ b/content/renderer/media/android/renderer_media_session_manager.h
@@ -16,6 +16,7 @@
 namespace content {
 
 class WebMediaSessionAndroid;
+struct MediaMetadata;
 
 class CONTENT_EXPORT RendererMediaSessionManager : public RenderFrameObserver {
  public:
@@ -33,6 +34,7 @@ class CONTENT_EXPORT RendererMediaSessionManager : public RenderFrameObserver {
   void Deactivate(
       int session_id,
       scoped_ptr<blink::WebMediaSessionDeactivateCallback> callback);
+  void SetMetadata(int session_id, const MediaMetadata& metadata);
 
   void OnDidActivate(int request_id, bool success);
   void OnDidDeactivate(int request_id);