Implement MediaSession on top of the WebMediaPlayerDelegate.

content/browser/media/android/browser_media_player_manager.h

 // Copyright 2013 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_BROWSER_MEDIA_ANDROID_BROWSER_MEDIA_PLAYER_MANAGER_H_
 #define CONTENT_BROWSER_MEDIA_ANDROID_BROWSER_MEDIA_PLAYER_MANAGER_H_
 
 #include <map>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
 #include "base/time/time.h"
 #include "content/browser/android/content_video_view.h"
-#include "content/browser/media/android/media_session_observer.h"
 #include "content/common/content_export.h"
 #include "content/common/media/media_player_messages_enums_android.h"
 #include "ipc/ipc_message.h"
 #include "media/base/android/media_player_android.h"
 #include "media/base/android/media_player_manager.h"
 #include "media/base/android/media_url_interceptor.h"
 #include "ui/gfx/geometry/rect_f.h"
 #include "url/gurl.h"
 
 namespace media {
@@ skipping 10 matching lines @@
 class ExternalVideoSurfaceContainer;
 class RenderFrameHost;
 class WebContents;
 
 // This class manages all the MediaPlayerAndroid objects.
 // It receives control operations from the the render process, and forwards
 // them to corresponding MediaPlayerAndroid object. Callbacks from
 // MediaPlayerAndroid objects are converted to IPCs and then sent to the render
 // process.
 class CONTENT_EXPORT BrowserMediaPlayerManager
-    : public media::MediaPlayerManager,
-      public MediaSessionObserver {
+    : public media::MediaPlayerManager {
  public:
   // Permits embedders to provide an extended version of the class.
   typedef BrowserMediaPlayerManager* (*Factory)(RenderFrameHost*);
   static void RegisterFactory(Factory factory);
 
   // Permits embedders to handle custom urls.
   static void RegisterMediaUrlInterceptor(
       media::MediaUrlInterceptor* media_url_interceptor);
 
   // Pass a java surface object to the MediaPlayerAndroid object
@@ skipping 46 matching lines @@
   media::MediaPlayerAndroid* GetFullscreenPlayer() override;
   media::MediaPlayerAndroid* GetPlayer(int player_id) override;
   bool RequestPlay(int player_id, base::TimeDelta duration,
                    bool has_audio) override;
 #if defined(VIDEO_HOLE)
   void AttachExternalVideoSurface(int player_id, jobject surface);
   void DetachExternalVideoSurface(int player_id);
   void OnFrameInfoUpdated();
 #endif  // defined(VIDEO_HOLE)
 
-  // MediaSessionObserver overrides.
-  void OnSuspend(int player_id) override;
-  void OnResume(int player_id) override;
-
   // Message handlers.
   virtual void OnEnterFullscreen(int player_id);
   virtual void OnInitialize(
       const MediaPlayerHostMsg_Initialize_Params& media_player_params);
   virtual void OnStart(int player_id);
   virtual void OnSeek(int player_id, const base::TimeDelta& time);
   virtual void OnPause(int player_id, bool is_media_related_action);
   virtual void OnSetVolume(int player_id, double volume);
   virtual void OnSetPoster(int player_id, const GURL& poster);
   virtual void OnSuspendAndReleaseResources(int player_id);
@@ skipping 36 matching lines @@
   // On the contrary, requests with false |temporary| value are subject to
   // clean up if their players are idle.
   virtual bool RequestDecoderResources(int player_id, bool temporary);
 
   // MediaPlayerAndroid must call this to inform the manager that it has
   // released the decoder resources. This can be triggered by the
   // ReleasePlayer() call below, or when meta data is extracted, or when player
   // is stuck in an error.
   virtual void OnDecoderResourcesReleased(int player_id);
 
+  virtual bool IsPlayingRemotely(int player_id);

[mlamouri (slow - plz ping), 2016/01/19 16:59:11]

FWIW, zqzhang@ has a similar change.

+
   int RoutingID();
 
   // Helper function to send messages to RenderFrameObserver.
   bool Send(IPC::Message* msg);
 
  private:
   // Constructs a MediaPlayerAndroid object.
   media::MediaPlayerAndroid* CreateMediaPlayer(
       const MediaPlayerHostMsg_Initialize_Params& media_player_params,
       bool hide_url_log,
@@ skipping 38 matching lines @@
   int fullscreen_player_id_;
 
   // Whether the fullscreen player has been Release()-d.
   bool fullscreen_player_is_released_;
 
   WebContents* const web_contents_;
 
   // Object for retrieving resources media players.
   scoped_ptr<media::MediaResourceGetter> media_resource_getter_;
 
+  // Map of player IDs to delegate IDs for use with
+  // MediaWebContentsObserverAndroid.
+  std::map<int, int64_t> player_id_to_delegate_id_map_;
+
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<BrowserMediaPlayerManager> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserMediaPlayerManager);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_MEDIA_ANDROID_BROWSER_MEDIA_PLAYER_MANAGER_H_