Fix ChunkDemuxer seeks that occur during a partially parsed cluster.

media/webm/webm_cluster_parser.cc

 // 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.
 
 #include "media/webm/webm_cluster_parser.h"
 
 #include "base/logging.h"
 #include "media/base/data_buffer.h"
 #include "media/webm/webm_constants.h"
 
@@ skipping 15 matching lines @@
       audio_default_duration_(audio_default_duration),
       video_track_num_(video_track_num),
       video_default_duration_(video_default_duration),
       parser_(kWebMIdCluster),
       last_block_timecode_(-1),
       cluster_timecode_(-1) {
 }
 
 WebMClusterParser::~WebMClusterParser() {}
 
+void WebMClusterParser::Reset() {
+  audio_buffers_.clear();
+  video_buffers_.clear();
+  last_block_timecode_ = -1;
+  cluster_timecode_ = -1;
+  parser_.Reset();
+}
+
 int WebMClusterParser::Parse(const uint8* buf, int size) {
   audio_buffers_.clear();
   video_buffers_.clear();
 
   int result = parser_.Parse(buf, size, this);
 
   if (result <= 0)
     return result;
 
   if (parser_.IsParsingComplete()) {
@@ skipping 92 matching lines @@
     DVLOG(1) << "Got SimpleBlock timecode is not strictly monotonically "
             << "increasing for track " << track_num;
     return false;
   }
 
   queue->push_back(buffer);
   return true;
 }
 
 }  // namespace media