Make MediaSession available on Desktop

content/browser/media/android/media_web_contents_observer_android.h

 // Copyright 2016 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_MEDIA_WEB_CONTENTS_OBSERVER_ANDROID_H_
 #define CONTENT_BROWSER_MEDIA_ANDROID_MEDIA_WEB_CONTENTS_OBSERVER_ANDROID_H_
 
 #include <stdint.h>
 
 #include <memory>
 
-#include "base/containers/scoped_ptr_hash_map.h"
 #include "base/macros.h"
 #include "content/browser/media/media_web_contents_observer.h"
 #include "content/common/content_export.h"
 
 namespace media {
 enum class MediaContentType;
 }  // namespace media
 
 namespace content {
 
 class BrowserMediaPlayerManager;
-class BrowserMediaSessionManager;
 class BrowserSurfaceViewManager;
 
 // This class adds Android specific extensions to the MediaWebContentsObserver.
 class CONTENT_EXPORT MediaWebContentsObserverAndroid
     : public MediaWebContentsObserver {
  public:
   explicit MediaWebContentsObserverAndroid(WebContents* web_contents);
   ~MediaWebContentsObserverAndroid() override;
 
   // Returns the android specific observer for a given web contents.
   static MediaWebContentsObserverAndroid* FromWebContents(
       WebContents* web_contents);
 
   // Gets one of the managers associated with the given |render_frame_host|.
   // Creates a new one if it doesn't exist. The caller doesn't own the
   // returned pointer.
   BrowserMediaPlayerManager* GetMediaPlayerManager(
       RenderFrameHost* render_frame_host);
-  BrowserMediaSessionManager* GetMediaSessionManager(
-      RenderFrameHost* render_frame_host);
   BrowserSurfaceViewManager* GetSurfaceViewManager(
       RenderFrameHost* render_frame_host);
 
-  // Sets or overrides the BrowserMediaSessionManager for the given
-  // |render_frame_host|.
-  void SetMediaSessionManagerForTest(
-      RenderFrameHost* render_frame_host,
-      std::unique_ptr<BrowserMediaSessionManager> manager);
-
   // Called by the WebContents when a tab has been closed but may still be
   // available for "undo" -- indicates that all media players (even audio only
   // players typically allowed background audio) bound to this WebContents must
   // be suspended.
   void SuspendAllMediaPlayers();
 
   // Initiates a synchronous MediaSession request for browser side players.
   //
   // TODO(dalecurtis): Delete this method once we're no longer using WMPA and
   // the BrowserMediaPlayerManagers.  Tracked by http://crbug.com/580626
@@ skipping 19 matching lines @@
 
   bool OnSurfaceViewManagerMessageReceived(const IPC::Message& message,
                                      RenderFrameHost* render_frame_host);
 
   // Map from RenderFrameHost* to BrowserMediaPlayerManager.
   using MediaPlayerManagerMap =
       base::ScopedPtrHashMap<RenderFrameHost*,
                              std::unique_ptr<BrowserMediaPlayerManager>>;
   MediaPlayerManagerMap media_player_managers_;
 
-  // Map from RenderFrameHost* to BrowserMediaSessionManager.
-  using MediaSessionManagerMap =
-      base::ScopedPtrHashMap<RenderFrameHost*,
-                             std::unique_ptr<BrowserMediaSessionManager>>;
-  MediaSessionManagerMap media_session_managers_;
-
   using SurfaceViewManagerMap =
       base::ScopedPtrHashMap<RenderFrameHost*,
                              std::unique_ptr<BrowserSurfaceViewManager>>;
   SurfaceViewManagerMap surface_view_managers_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaWebContentsObserverAndroid);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_MEDIA_ANDROID_MEDIA_WEB_CONTENTS_OBSERVER_ANDROID_H_