Use StreamParser::TrackId instead of string for MediaTrack::byteStreamTrackId

media/filters/ffmpeg_demuxer_unittest.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 <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
 #include <deque>
 #include <string>
@@ skipping 1184 matching lines @@
 }
 
 TEST_F(FFmpegDemuxerTest, Read_Mp4_Media_Track_Info) {
   CreateDemuxer("bear.mp4");
   InitializeDemuxer();
 
   EXPECT_EQ(media_tracks_->tracks().size(), 2u);
 
   const MediaTrack& audio_track = *(media_tracks_->tracks()[0]);
   EXPECT_EQ(audio_track.type(), MediaTrack::Audio);
-  EXPECT_EQ(audio_track.id(), "1");
+  EXPECT_EQ(audio_track.id(), 1);
   EXPECT_EQ(audio_track.kind(), "main");
   EXPECT_EQ(audio_track.label(), "GPAC ISO Audio Handler");
   EXPECT_EQ(audio_track.language(), "und");
 
   const MediaTrack& video_track = *(media_tracks_->tracks()[1]);
   EXPECT_EQ(video_track.type(), MediaTrack::Video);
-  EXPECT_EQ(video_track.id(), "2");
+  EXPECT_EQ(video_track.id(), 2);
   EXPECT_EQ(video_track.kind(), "main");
   EXPECT_EQ(video_track.label(), "GPAC ISO Video Handler");
   EXPECT_EQ(video_track.language(), "und");
 }
 
 #endif  // defined(USE_PROPRIETARY_CODECS)
 
 TEST_F(FFmpegDemuxerTest, Read_Webm_Media_Track_Info) {
   CreateDemuxer("bear.webm");
   InitializeDemuxer();
 
   EXPECT_EQ(media_tracks_->tracks().size(), 2u);
 
   const MediaTrack& video_track = *(media_tracks_->tracks()[0]);
   EXPECT_EQ(video_track.type(), MediaTrack::Video);
-  EXPECT_EQ(video_track.id(), "1");
+  EXPECT_EQ(video_track.id(), 1);
   EXPECT_EQ(video_track.kind(), "main");
   EXPECT_EQ(video_track.label(), "");
   EXPECT_EQ(video_track.language(), "");
 
   const MediaTrack& audio_track = *(media_tracks_->tracks()[1]);
   EXPECT_EQ(audio_track.type(), MediaTrack::Audio);
-  EXPECT_EQ(audio_track.id(), "2");
+  EXPECT_EQ(audio_track.id(), 2);
   EXPECT_EQ(audio_track.kind(), "main");
   EXPECT_EQ(audio_track.label(), "");
   EXPECT_EQ(audio_track.language(), "");
 }
 
 }  // namespace media