Revert of Introduce WebMediaSession

content/renderer/render_frame_impl.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_RENDERER_RENDER_FRAME_IMPL_H_
 #define CONTENT_RENDERER_RENDER_FRAME_IMPL_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 366 matching lines @@
 
   // blink::WebFrameClient implementation:
   blink::WebPlugin* createPlugin(blink::WebLocalFrame* frame,
                                  const blink::WebPluginParams& params) override;
   blink::WebMediaPlayer* createMediaPlayer(
       blink::WebLocalFrame* frame,
       const blink::WebURL& url,
       blink::WebMediaPlayerClient* client,
       blink::WebMediaPlayerEncryptedMediaClient* encrypted_client,
       blink::WebContentDecryptionModule* initial_cdm) override;
-  blink::WebMediaSession* createMediaSession() override;
   blink::WebApplicationCacheHost* createApplicationCacheHost(
       blink::WebLocalFrame* frame,
       blink::WebApplicationCacheHostClient* client) override;
   blink::WebWorkerContentSettingsClientProxy*
   createWorkerContentSettingsClientProxy(blink::WebLocalFrame* frame) override;
   blink::WebExternalPopupMenu* createExternalPopupMenu(
       const blink::WebPopupMenuInfo& popup_menu_info,
       blink::WebExternalPopupMenuClient* popup_menu_client) override;
   blink::WebCookieJar* cookieJar(blink::WebLocalFrame* frame) override;
   blink::WebServiceWorkerProvider* createServiceWorkerProvider(
@@ skipping 669 matching lines @@
 #endif
 
   base::WeakPtrFactory<RenderFrameImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderFrameImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_FRAME_IMPL_H_