media: Cleanup class/struct forward declarations

media/filters/decoder_selector.h

 // Copyright 2014 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_DECODER_SELECTOR_H_
 #define MEDIA_FILTERS_DECODER_SELECTOR_H_
 
 #include <memory>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_vector.h"
 #include "base/memory/weak_ptr.h"
 #include "build/build_config.h"
 #include "media/base/demuxer_stream.h"
 #include "media/base/pipeline_status.h"
 #include "media/filters/decoder_stream_traits.h"
 
 namespace base {
 class SingleThreadTaskRunner;
 }
 
 namespace media {
 
 class CdmContext;
-class DecoderBuffer;
 class DecryptingDemuxerStream;
 class MediaLog;
 
 // DecoderSelector (creates if necessary and) initializes the proper
 // Decoder for a given DemuxerStream. If the given DemuxerStream is
 // encrypted, a DecryptingDemuxerStream may also be created.
 // The template parameter |StreamType| is the type of stream we will be
 // selecting a decoder for.
 template<DemuxerStream::Type StreamType>
 class MEDIA_EXPORT DecoderSelector {
@@ skipping 70 matching lines @@
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(DecoderSelector);
 };
 
 typedef DecoderSelector<DemuxerStream::VIDEO> VideoDecoderSelector;
 typedef DecoderSelector<DemuxerStream::AUDIO> AudioDecoderSelector;
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_DECODER_SELECTOR_H_