Implemented injected message loops for PipelineImpl.

webkit/glue/webmediaplayer_impl.h

 // Copyright (c) 2008-2009 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.
 //
 // Delegate calls from WebCore::MediaPlayerPrivate to Chrome's video player.
 // It contains PipelineImpl which is the actual media player pipeline, it glues
 // the media player pipeline, data source, audio renderer and renderer.
 // PipelineImpl would creates multiple threads and access some public methods
 // of this class, so we need to be extra careful about concurrent access of
 // methods and members.
@@ skipping 230 matching lines @@
   WebKit::WebMediaPlayer::NetworkState network_state_;
   WebKit::WebMediaPlayer::ReadyState ready_state_;
 
   // Message loops for posting tasks between Chrome's main thread. Also used
   // for DCHECKs so methods calls won't execute in the wrong thread.
   MessageLoop* main_loop_;
 
   // A collection of factories for creating filters.
   scoped_refptr<media::FilterFactoryCollection> filter_factory_;
 
-  // The actual pipeline. We do it a composition here because we expect to have
-  // the same lifetime as the pipeline.
-  media::PipelineImpl pipeline_;
+  // The actual pipeline and the thread it runs on.
+  scoped_ptr<media::PipelineImpl> pipeline_;
+  base::Thread pipeline_thread_;
 
   WebKit::WebMediaPlayerClient* client_;
 
   scoped_refptr<Proxy> proxy_;
 
   DISALLOW_COPY_AND_ASSIGN(WebMediaPlayerImpl);
 };
 
 }  // namespace webkit_glue
 
 #endif  // WEBKIT_GLUE_WEBMEDIAPLAYER_IMPL_H_