Update the WebMediaSourceClientImpl & ChunkDemuxer to received explicit end of stream cancellation.

media/filters/source_buffer_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.
 
 // SourceBufferStream is a data structure that stores media Buffers in ranges.
 // Buffers can be appended out of presentation order. Buffers are retrieved by
 // seeking to the desired start point and calling GetNextBuffer(). Buffers are
 // returned in sequential presentation order.
 
 #ifndef MEDIA_FILTERS_SOURCE_BUFFER_STREAM_H_
@@ skipping 72 matching lines @@
   // the last Seek() call.
   // Returns kSuccess if |out_buffer| is filled with a valid buffer, kNeedBuffer
   // if there is not enough data buffered to fulfill the request, and
   // kConfigChange if the next buffer requires a config change.
   Status GetNextBuffer(scoped_refptr<StreamParserBuffer>* out_buffer);
 
   // Returns a list of the buffered time ranges.
   Ranges<base::TimeDelta> GetBufferedTime() const;
 
   // Notifies this object that end of stream has been signalled.
-  void EndOfStream();
+  void MarkEndOfStream();
 
-  // Cancel the previous end of stream notification.
-  void CancelEndOfStream();
+  // Clear the end of stream state set by MarkEndOfStream().
+  void UnmarkEndOfStream();
 
   const AudioDecoderConfig& GetCurrentAudioDecoderConfig();
   const VideoDecoderConfig& GetCurrentVideoDecoderConfig();
 
   // Notifies this object that the audio config has changed and buffers in
   // future Append() calls should be associated with this new config.
   bool UpdateAudioConfig(const AudioDecoderConfig& config);
 
   // Notifies this object that the video config has changed and buffers in
   // future Append() calls should be associated with this new config.
@@ skipping 230 matching lines @@
   // config. GetNextBuffer() must not be called again until
   // GetCurrentXXXDecoderConfig() has been called.
   bool config_change_pending_;
 
   DISALLOW_COPY_AND_ASSIGN(SourceBufferStream);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_SOURCE_BUFFER_STREAM_H_