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

media/blink/webmediaplayer_impl.cc

Index: media/blink/webmediaplayer_impl.cc
diff --git a/media/blink/webmediaplayer_impl.cc b/media/blink/webmediaplayer_impl.cc
index 36315a4a5ab8f6534aea4e305208ee2715c20098..74aa0d05e9b06140a89f2566ffbefbe9bf059174 100644
--- a/media/blink/webmediaplayer_impl.cc
+++ b/media/blink/webmediaplayer_impl.cc
@@ -19,6 +19,7 @@
 #include "base/debug/crash_logging.h"
 #include "base/metrics/histogram.h"
 #include "base/single_thread_task_runner.h"
+#include "base/strings/string_number_conversions.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/task_runner_util.h"
 #include "base/thread_task_runner_handle.h"
@@ -829,7 +830,7 @@ void WebMediaPlayerImpl::OnFFmpegMediaTracksUpdated(
   for (const auto& track : tracks->tracks()) {
     if (track->type() == MediaTrack::Audio) {
       auto track_id = client_->addAudioTrack(
-          blink::WebString::fromUTF8(track->id()),
+          blink::WebString::fromUTF8(base::UintToString(track->id())),
           blink::WebMediaPlayerClient::AudioTrackKindMain,
           blink::WebString::fromUTF8(track->label()),
           blink::WebString::fromUTF8(track->language()),
@@ -837,7 +838,7 @@ void WebMediaPlayerImpl::OnFFmpegMediaTracksUpdated(
       (void)track_id;
     } else if (track->type() == MediaTrack::Video) {
       auto track_id = client_->addVideoTrack(
-          blink::WebString::fromUTF8(track->id()),
+          blink::WebString::fromUTF8(base::UintToString(track->id())),
           blink::WebMediaPlayerClient::VideoTrackKindMain,
           blink::WebString::fromUTF8(track->label()),
           blink::WebString::fromUTF8(track->language()),