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

media/formats/webm/webm_tracks_parser.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 "media/formats/webm/webm_tracks_parser.h"
 
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "media/base/media_util.h"
@@ skipping 203 matching lines @@
           return false;
         }
         audio_default_duration_ = default_duration_;
 
         DCHECK(!audio_decoder_config_.IsValidConfig());
         if (!audio_client_.InitializeConfig(
                 codec_id_, codec_private_, seek_preroll_, codec_delay_,
                 encryption_scheme, &audio_decoder_config_)) {
           return false;
         }
-        media_tracks_->AddAudioTrack(audio_decoder_config_,
-                                     base::Uint64ToString(track_num_), "main",
-                                     track_name_, track_language_);
+        media_tracks_->AddAudioTrack(
+            audio_decoder_config_,
+            static_cast<StreamParser::TrackId>(track_num_), "main", track_name_,
+            track_language_);
       } else {
         MEDIA_LOG(DEBUG, media_log_) << "Ignoring audio track " << track_num_;
         ignored_tracks_.insert(track_num_);
       }
     } else if (track_type_ == kWebMTrackTypeVideo) {
       detected_video_track_count_++;
       if (video_track_num_ == -1) {
         video_track_num_ = track_num_;
         video_encryption_key_id_ = encryption_key_id;
 
         if (default_duration_ == 0) {
           MEDIA_LOG(ERROR, media_log_) << "Illegal 0ns video TrackEntry "
                                           "DefaultDuration";
           return false;
         }
         video_default_duration_ = default_duration_;
 
         DCHECK(!video_decoder_config_.IsValidConfig());
         if (!video_client_.InitializeConfig(codec_id_, codec_private_,
                                             encryption_scheme,
                                             &video_decoder_config_)) {
           return false;
         }
-        media_tracks_->AddVideoTrack(video_decoder_config_,
-                                     base::Uint64ToString(track_num_), "main",
-                                     track_name_, track_language_);
+        media_tracks_->AddVideoTrack(
+            video_decoder_config_,
+            static_cast<StreamParser::TrackId>(track_num_), "main", track_name_,
+            track_language_);
       } else {
         MEDIA_LOG(DEBUG, media_log_) << "Ignoring video track " << track_num_;
         ignored_tracks_.insert(track_num_);
       }
     } else if (track_type_ == kWebMTrackTypeSubtitlesOrCaptions ||
                track_type_ == kWebMTrackTypeDescriptionsOrMetadata) {
       detected_text_track_count_++;
       if (ignore_text_tracks_) {
         MEDIA_LOG(DEBUG, media_log_) << "Ignoring text track " << track_num_;
         ignored_tracks_.insert(track_num_);
@@ skipping 100 matching lines @@
     } else {
       track_language_ = str;
     }
     return true;
   }
 
   return true;
 }
 
 }  // namespace media