Move WebMediaPlayerImpl and its dependencies to media/blink.

media/blink/webmediaplayer_delegate.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_MEDIA_WEBMEDIAPLAYER_DELEGATE_H_
-#define CONTENT_RENDERER_MEDIA_WEBMEDIAPLAYER_DELEGATE_H_
+#ifndef MEDIA_BLINK_WEBMEDIAPLAYER_DELEGATE_H_
+#define MEDIA_BLINK_WEBMEDIAPLAYER_DELEGATE_H_
 
 namespace blink {
 class WebMediaPlayer;
 }
-namespace content {
+namespace media {
 
 // An interface to allow a WebMediaPlayerImpl to communicate changes of state
 // to objects that need to know.
 class WebMediaPlayerDelegate {
  public:
   WebMediaPlayerDelegate() {}
 
   // The specified player started playing media.
   virtual void DidPlay(blink::WebMediaPlayer* player) = 0;
 
   // The specified player stopped playing media.
   virtual void DidPause(blink::WebMediaPlayer* player) = 0;
 
   // The specified player was destroyed. Do not call any methods on it.
   virtual void PlayerGone(blink::WebMediaPlayer* player) = 0;
 
  protected:
   virtual ~WebMediaPlayerDelegate() {}
 };
 
-}  // namespace content
+}  // namespace media
 
-#endif  // CONTENT_RENDERER_MEDIA_WEBMEDIAPLAYER_DELEGATE_H_
+#endif  // MEDIA_BLINK_WEBMEDIAPLAYER_DELEGATE_H_