Remove dropped frame counting and task posting from VideoFrameCompositor.

content/renderer/media/webmediaplayer_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_MEDIA_WEBMEDIAPLAYER_IMPL_H_
 #define CONTENT_RENDERER_MEDIA_WEBMEDIAPLAYER_IMPL_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 314 matching lines @@
 
   BufferedDataSourceHostImpl buffered_data_source_host_;
   // TODO(sandersd): Remove this cache. http://crbug.com/360254
   blink::WebTimeRanges buffered_web_time_ranges_;
 
   // Temporary for EME v0.1. In the future the init data type should be passed
   // through GenerateKeyRequest() directly from WebKit.
   std::string init_data_type_;
 
   // Video rendering members.
-  VideoFrameCompositor compositor_;
+  scoped_refptr<base::SingleThreadTaskRunner> compositor_task_runner_;
+  VideoFrameCompositor* compositor_;  // Deleted on |compositor_task_runner_|.
   media::SkCanvasVideoRenderer skcanvas_video_renderer_;
 
   // The compositor layer for displaying the video content when using composited
   // playback.
   scoped_ptr<webkit::WebLayerImpl> video_weblayer_;
 
   // Text track objects get a unique index value when they're created.
   int text_track_index_;
 
   // Manages decryption keys and decrypts encrypted frames.
   scoped_ptr<ProxyDecryptor> proxy_decryptor_;
 
   // Non-owned pointer to the CDM. Updated via calls to
   // setContentDecryptionModule().
   WebContentDecryptionModuleImpl* web_cdm_;
 
   media::DecryptorReadyCB decryptor_ready_cb_;
 
   DISALLOW_COPY_AND_ASSIGN(WebMediaPlayerImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_WEBMEDIAPLAYER_IMPL_H_