Fix ChunkDemuxer seeks that occur during a partially parsed cluster.

media/webm/webm_cluster_parser.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.
 
 #ifndef MEDIA_WEBM_WEBM_CLUSTER_PARSER_H_
 #define MEDIA_WEBM_WEBM_CLUSTER_PARSER_H_
 
 #include <deque>
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
 #include "media/base/buffers.h"
 #include "media/webm/webm_parser.h"
 
 namespace media {
 
 class WebMClusterParser : public WebMParserClient {
  public:
   typedef std::deque<scoped_refptr<Buffer> > BufferQueue;
 
   WebMClusterParser(int64 timecode_scale,
                     int audio_track_num,
                     base::TimeDelta audio_default_duration,
                     int video_track_num,
                     base::TimeDelta video_default_duration);
   virtual ~WebMClusterParser();
 
+  // Resets the parser state so it can accept a new cluster.
+  void Reset();
+
   // Parses a WebM cluster element in |buf|.
   //
   // Returns -1 if the parse fails.
   // Returns 0 if more data is needed.
   // Returns the number of bytes parsed on success.
   int Parse(const uint8* buf, int size);
 
   const BufferQueue& audio_buffers() const { return audio_buffers_; }
   const BufferQueue& video_buffers() const { return video_buffers_; }
 
@@ skipping 22 matching lines @@
   int64 cluster_timecode_;
   BufferQueue audio_buffers_;
   BufferQueue video_buffers_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(WebMClusterParser);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_WEBM_WEBM_CLUSTER_PARSER_H_