Remove buffer duration calculation from WebMClusterParser and update SourceBufferStream accordingly

media/base/stream_parser_buffer.cc

 // 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.
 
 #include "media/base/stream_parser_buffer.h"
 
 #include "base/logging.h"
 
 namespace media {
 
@@ skipping 10 matching lines @@
 base::TimeDelta StreamParserBuffer::GetDecodeTimestamp() const {
   if (decode_timestamp_ == kNoTimestamp())
     return GetTimestamp();
   return decode_timestamp_;
 }
 
 void StreamParserBuffer::SetDecodeTimestamp(const base::TimeDelta& timestamp) {
   decode_timestamp_ = timestamp;
 }
 
-base::TimeDelta StreamParserBuffer::GetEndTimestamp() const {
-  DCHECK(GetDecodeTimestamp() != kNoTimestamp());
-  DCHECK(GetDuration() != kNoTimestamp());
-  return GetDecodeTimestamp() + GetDuration();
-}
-
 StreamParserBuffer::StreamParserBuffer(const uint8* data, int data_size,
                                        bool is_keyframe)
     : DecoderBuffer(data, data_size),
       is_keyframe_(is_keyframe),
       decode_timestamp_(kNoTimestamp()) {
   SetDuration(kNoTimestamp());
 }
 
-
 StreamParserBuffer::~StreamParserBuffer() {
 }
 
 }  // namespace media