NOT FOR LANDING Implement WebMediaSession

content/browser/media/android/browser_media_session_manager.h

Index: content/browser/media/android/browser_media_session_manager.h
diff --git a/content/browser/media/android/browser_media_session_manager.h b/content/browser/media/android/browser_media_session_manager.h
index 3b07b295816780eb8859f5b71d5958501d4ad547..6e30ea1e7e3dbeea44d6c6caa0a287519a980984 100644
--- a/content/browser/media/android/browser_media_session_manager.h
+++ b/content/browser/media/android/browser_media_session_manager.h
@@ -6,6 +6,8 @@
 #define CONTENT_BROWSER_MEDIA_ANDROID_BROWSER_MEDIA_SESSION_MANAGER_H_
 
 #include "base/macros.h"
+#include "base/memory/scoped_vector.h"
+#include "content/browser/media/android/media_session.h"
 
 namespace IPC {
 class Message;
@@ -25,10 +27,17 @@ class BrowserMediaSessionManager {
 
   int GetRoutingID() const;
 
+  MediaSession* GetSession(int session_id);
+
+  void RemovePlayers(MediaSessionObserver* observer);
+  void RemovePlayer(MediaSessionObserver* observer, int player_id);
+  void OnPlayerPaused(MediaSessionObserver* observer, int player_id);
+
   bool Send(IPC::Message* msg);
 
  private:
   RenderFrameHost* const render_frame_host_;
+  ScopedVector<MediaSession> sessions_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserMediaSessionManager);
 };