Hook up RendererMediaSessionManager with browser side

content/renderer/media/android/renderer_media_session_manager.h

 // 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_RENDERER_MEDIA_SESSION_MANAGER_H_
 #define CONTENT_RENDERER_MEDIA_ANDROID_RENDERER_MEDIA_SESSION_MANAGER_H_
 
 #include <map>
 
 #include "base/macros.h"
 #include "content/common/content_export.h"
 #include "content/public/renderer/render_frame_observer.h"
 
 namespace content {
 
 class WebMediaSessionAndroid;
 
 class CONTENT_EXPORT RendererMediaSessionManager : public RenderFrameObserver {
  public:
   RendererMediaSessionManager(RenderFrame* render_frame);
   ~RendererMediaSessionManager() override;
 
+  // RenderFrameObserver override.
+  bool OnMessageReceived(const IPC::Message& msg) override;
+
   int RegisterMediaSession(WebMediaSessionAndroid* session);
   void UnregisterMediaSession(int session_id);
 
+  void Activate(int session_id, int activation_id);
+  void Deactivate(int session_id, int deactivation_id);
+
+  void OnDidActivate(int session_id, int activation_id, bool success);
+  void OnDidDeactivate(int session_id, int deactivation_id);

[mlamouri (slow - plz ping), 2015/12/02 15:53:31]

nit: use request_id for the four new methods here.

[davve, 2015/12/04 12:43:09]

Done.

+
  private:
   friend class WebMediaSessionTest;
 
   std::map<int, WebMediaSessionAndroid*> sessions_;
   int next_session_id_;
 
   DISALLOW_COPY_AND_ASSIGN(RendererMediaSessionManager);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_ANDROID_RENDERER_MEDIA_SESSION_MANAGER_H_