Implemented injected message loops for PipelineImpl.

media/player/movie.h

Index: media/player/movie.h
diff --git a/media/player/movie.h b/media/player/movie.h
index fdaa2b5a9ac4ee788a028605f0227026106a9c5c..eb23822e72912966e25ea9e4330ede20e9873434 100644
--- a/media/player/movie.h
+++ b/media/player/movie.h
@@ -11,6 +11,7 @@
 
 #include "base/scoped_ptr.h"
 #include "base/singleton.h"
+#include "base/thread.h"
 
 class WtlVideoRenderer;
 
@@ -90,6 +91,7 @@ class Movie : public Singleton<Movie> {
   virtual ~Movie();
 
   scoped_ptr<PipelineImpl> pipeline_;
+  scoped_ptr<base::Thread> thread_;
 
   bool enable_audio_;
   bool enable_swscaler_;