Cleanup: Remove unneeded forward declarations in base, dbug, gpu, ipc, jingle, and media.

media/filters/ffmpeg_demuxer.h

 // Copyright (c) 2011 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.
 
 // Implements the Demuxer interface using FFmpeg's libavformat.  At this time
 // will support demuxing any audio/video format thrown at it.  The streams
 // output mime types audio/x-ffmpeg and video/x-ffmpeg and include an integer
 // key FFmpegCodecID which contains the CodecID enumeration value.  The CodecIDs
 // can be used to create and initialize the corresponding FFmpeg decoder.
 //
@@ skipping 21 matching lines @@
 #include "media/base/buffers.h"
 #include "media/base/demuxer.h"
 #include "media/base/pipeline.h"
 #include "media/base/video_decoder_config.h"
 #include "media/filters/ffmpeg_glue.h"
 
 // FFmpeg forward declarations.
 struct AVFormatContext;
 struct AVPacket;
 struct AVRational;
+struct AVStream;
 
 namespace media {
 
 class BitstreamConverter;
 class FFmpegDemuxer;
 
-// Forward declaration for scoped_ptr_malloc.
-class ScopedPtrAVFree;
-
 class FFmpegDemuxerStream : public DemuxerStream {
  public:
   // Keeps a copy of |demuxer| and initializes itself using information
   // inside |stream|.  Both parameters must outlive |this|.
   FFmpegDemuxerStream(FFmpegDemuxer* demuxer, AVStream* stream);
 
   // Returns true is this stream has pending reads, false otherwise.
   //
   // Safe to call on any thread.
   bool HasPendingReads();
@@ skipping 199 matching lines @@
   // starting clock value to match the timestamps in the media file. Default
   // is 0.
   base::TimeDelta start_time_;
 
   DISALLOW_COPY_AND_ASSIGN(FFmpegDemuxer);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_FFMPEG_DEMUXER_H_