Generate and assign media track ids in demuxers.

media/blink/webmediaplayer_impl_unittest.cc

 // Copyright 2016 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/blink/webmediaplayer_impl.h"
 
 #include <stdint.h>
 
 #include <memory>
 
@@ skipping 38 matching lines @@
   void durationChanged() override {}
   void sizeChanged() override {}
   void playbackStateChanged() override {}
   void setWebLayer(blink::WebLayer*) override {}
   blink::WebMediaPlayer::TrackId addAudioTrack(
       const blink::WebString& id,
       blink::WebMediaPlayerClient::AudioTrackKind,
       const blink::WebString& label,
       const blink::WebString& language,
       bool enabled) override {
-    return 0;
+    return blink::WebMediaPlayer::TrackId();
   }
   void removeAudioTrack(blink::WebMediaPlayer::TrackId) override {}
   blink::WebMediaPlayer::TrackId addVideoTrack(
       const blink::WebString& id,
       blink::WebMediaPlayerClient::VideoTrackKind,
       const blink::WebString& label,
       const blink::WebString& language,
       bool selected) override {
-    return 0;
+    return blink::WebMediaPlayer::TrackId();
   }
   void removeVideoTrack(blink::WebMediaPlayer::TrackId) override {}
   void addTextTrack(blink::WebInbandTextTrack*) override {}
   void removeTextTrack(blink::WebInbandTextTrack*) override {}
   void mediaSourceOpened(blink::WebMediaSource*) override {}
   void requestSeek(double) override {}
   void remoteRouteAvailabilityChanged(bool) override {}
   void connectedToRemoteDevice() override {}
   void disconnectedFromRemoteDevice() override {}
   void cancelledRemotePlaybackRequest() override {}
@@ skipping 350 matching lines @@
   EXPECT_FALSE(state.is_suspended);
 
   SetPaused(false);
   state = ComputePlayStateSuspended();
   EXPECT_EQ(WebMediaPlayerImpl::DelegateState::PLAYING, state.delegate_state);
   EXPECT_TRUE(state.is_memory_reporting_enabled);
   EXPECT_FALSE(state.is_suspended);
 }
 
 }  // namespace media