Media Session API: use MediaMetadata in the browser process.

content/browser/media/session/media_session.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_BROWSER_MEDIA_SESSION_MEDIA_SESSION_H_
 #define CONTENT_BROWSER_MEDIA_SESSION_MEDIA_SESSION_H_
 
 #include <stddef.h>
 
 #include "base/id_map.h"
 #include "base/macros.h"
 #include "content/browser/media/session/media_session_uma_helper.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/browser/web_contents_user_data.h"
+#include "content/public/common/media_metadata.h"
 
 class MediaSessionBrowserTest;
 
 namespace content {
 
 class MediaSessionDelegate;
 class MediaSessionObserver;
 
 // MediaSession manages the media session and audio focus for a given
 // WebContents. It is requesting the audio focus, pausing when requested by the
@@ skipping 25 matching lines @@
     // Suspended by the page via script or user interaction.
     CONTENT,
   };
 
   // Returns the MediaSession associated to this WebContents. Creates one if
   // none is currently available.
   CONTENT_EXPORT static MediaSession* Get(WebContents* web_contents);
 
   ~MediaSession() override;
 
+  void setMetadata(const MediaMetadata& metadata) {
+    metadata_ = metadata;
+  }
+  const MediaMetadata& metadata() const { return metadata_; }
+
   // Adds the given player to the current media session. Returns whether the
   // player was successfully added. If it returns false, AddPlayer() should be
   // called again later.
   CONTENT_EXPORT bool AddPlayer(MediaSessionObserver* observer,
                                 int player_id, Type type);
 
   // Removes the given player from the current media session. Abandons audio
   // focus if that was the last player in the session.
   CONTENT_EXPORT void RemovePlayer(MediaSessionObserver* observer,
                                    int player_id);
@@ skipping 106 matching lines @@
   State audio_focus_state_;
   SuspendType suspend_type_;
   Type audio_focus_type_;
 
   MediaSessionUmaHelper uma_helper_;
 
   // The volume multiplier of this session. All players in this session should
   // multiply their volume with this multiplier to get the effective volume.
   double volume_multiplier_;
 
+  MediaMetadata metadata_;
+
   DISALLOW_COPY_AND_ASSIGN(MediaSession);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_MEDIA_SESSION_MEDIA_SESSION_H_