Introduce DecodeTimestamp class to make it easier to distiguish presentation and decode timestamps.

media/base/stream_parser_unittest.cc

 // Copyright 2014 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 <algorithm>
 #include <sstream>
 
 #include "base/basictypes.h"
 #include "media/base/stream_parser.h"
 #include "media/base/stream_parser_buffer.h"
@@ skipping 35 matching lines @@
                             BufferQueue* queue) {
   DCHECK(decode_timestamps);
   DCHECK(queue);
   DCHECK_NE(type, DemuxerStream::UNKNOWN);
   DCHECK_LT(type, DemuxerStream::NUM_TYPES);
   for (int i = 0; decode_timestamps[i] != kEnd; ++i) {
     scoped_refptr<StreamParserBuffer> buffer =
         StreamParserBuffer::CopyFrom(kFakeData, sizeof(kFakeData),
                                      true, type, track_id);
     buffer->SetDecodeTimestamp(
-        base::TimeDelta::FromMicroseconds(decode_timestamps[i]));
+        DecodeTimestamp::FromMicroseconds(decode_timestamps[i]));
     queue->push_back(buffer);
   }
 }
 
 class StreamParserTest : public testing::Test {
  protected:
   StreamParserTest() {}
 
   // Returns the number of buffers in |merged_buffers_| for which |predicate|
   // returns true.
@@ skipping 305 matching lines @@
   VerifyMergeSuccess(expected, true);
 
   // But appending something with a lower timestamp than the last timestamp
   // in the pre-existing merge result should fail.
   int more_audio_timestamps[] = { 106, kEnd };
   GenerateAudioBuffers(more_audio_timestamps);
   VerifyMergeFailure();
 }
 
 }  // namespace media
-