Pass in media message loop to VideoRendererBase and enforce calling on the right thread.

media/filters/ffmpeg_video_decoder.h

 // Copyright (c) 2012 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 MEDIA_FILTERS_FFMPEG_VIDEO_DECODER_H_
 #define MEDIA_FILTERS_FFMPEG_VIDEO_DECODER_H_
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "media/base/decryptor.h"
@@ skipping 33 matching lines @@
   virtual ~FFmpegVideoDecoder();
 
  private:
   enum DecoderState {
     kUninitialized,
     kNormal,
     kFlushCodec,
     kDecodeFinished
   };
 
-  // Carries out the reading operation scheduled by Read().
-  void DoRead(const ReadCB& read_cb);
-
-  // Reads from the demuxer stream.
+  // Reads from the demuxer stream and corresponding read callback.
   void ReadFromDemuxerStream();
-
-  // Carries out the buffer processing operation scheduled by
-  // DecryptOrDecodeBuffer().
-  void DoDecryptOrDecodeBuffer(DemuxerStream::Status status,
-                               const scoped_refptr<DecoderBuffer>& buffer);
+  void DecryptOrDecodeBuffer(DemuxerStream::Status status,
+                             const scoped_refptr<DecoderBuffer>& buffer);
 
   // Callback called by the decryptor to deliver decrypted data buffer and
   // reporting decrypt status. This callback could be called synchronously or
   // asynchronously.
   void BufferDecrypted(Decryptor::Status decrypt_status,
                        const scoped_refptr<DecoderBuffer>& buffer);
 
-  // Carries out the operation scheduled by BufferDecrypted().
-  void DoBufferDecrypted(Decryptor::Status decrypt_status,
-                         const scoped_refptr<DecoderBuffer>& buffer);
-
+  // Handles decoding an unencrypted encoded buffer.
   void DecodeBuffer(const scoped_refptr<DecoderBuffer>& buffer);
   bool Decode(const scoped_refptr<DecoderBuffer>& buffer,
               scoped_refptr<VideoFrame>* video_frame);
 
   // Handles (re-)initializing the decoder with a (new) config.
   // Returns true if initialization was successful.
   bool ConfigureDecoder();
 
   // Releases resources associated with |codec_context_| and |av_frame_|
   // and resets them to NULL.
@@ skipping 19 matching lines @@
   scoped_refptr<DemuxerStream> demuxer_stream_;
 
   Decryptor* decryptor_;
 
   DISALLOW_COPY_AND_ASSIGN(FFmpegVideoDecoder);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_FFMPEG_VIDEO_DECODER_H_