Migrate webkit/renderer/media/ to content/renderer/media/.

webkit/renderer/media/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 WEBKIT_RENDERER_MEDIA_WEBMEDIAPLAYER_DELEGATE_H_
 #define WEBKIT_RENDERER_MEDIA_WEBMEDIAPLAYER_DELEGATE_H_
 
 namespace WebKit {
 class WebMediaPlayer;
 }
 namespace webkit_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(WebKit::WebMediaPlayer* player) {}
+  virtual void DidPlay(WebKit::WebMediaPlayer* player) = 0;
 
   // The specified player stopped playing media.
-  virtual void DidPause(WebKit::WebMediaPlayer* player) {}
+  virtual void DidPause(WebKit::WebMediaPlayer* player) = 0;
 
   // The specified player was destroyed. Do not call any methods on it.
-  virtual void PlayerGone(WebKit::WebMediaPlayer* player) {}
+  virtual void PlayerGone(WebKit::WebMediaPlayer* player) = 0;
 
  protected:
   virtual ~WebMediaPlayerDelegate() {}
 };
 
 }  // namespace webkit_media
 
 #endif  // WEBKIT_RENDERER_MEDIA_WEBMEDIAPLAYER_DELEGATE_H_