Add default impl for DemuxerStream::EnableBitstreamConverter();

media/filters/decrypting_demuxer_stream.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_DECRYPTING_DEMUXER_STREAM_H_
 #define MEDIA_FILTERS_DECRYPTING_DEMUXER_STREAM_H_
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 31 matching lines @@
   // kPendingDemuxerRead or kPendingDecrypt state, waits for the pending
   // operation to finish before satisfying |closure|. Sets the state to
   // kUninitialized if |this| hasn't been initialized, or to kIdle otherwise.
   void Reset(const base::Closure& closure);
 
   // DemuxerStream implementation.
   virtual void Read(const ReadCB& read_cb) OVERRIDE;
   virtual AudioDecoderConfig audio_decoder_config() OVERRIDE;
   virtual VideoDecoderConfig video_decoder_config() OVERRIDE;
   virtual Type type() OVERRIDE;
-  virtual void EnableBitstreamConverter() OVERRIDE;
   virtual bool SupportsConfigChanges() OVERRIDE;
   virtual VideoRotation video_rotation() OVERRIDE;
 
  private:
   // For a detailed state diagram please see this link: http://goo.gl/8jAok
   // TODO(xhwang): Add a ASCII state diagram in this file after this class
   // stabilizes.
   // TODO(xhwang): Update this diagram for DecryptingDemuxerStream.
   enum State {
     kUninitialized = 0,
@@ skipping 64 matching lines @@
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<DecryptingDemuxerStream> weak_factory_;
   base::WeakPtr<DecryptingDemuxerStream> weak_this_;
 
   DISALLOW_COPY_AND_ASSIGN(DecryptingDemuxerStream);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_DECRYPTING_DEMUXER_STREAM_H_