Express audio delay more precisely in frames rather than milliseconds.

content/renderer/media/track_audio_renderer.h

Index: content/renderer/media/track_audio_renderer.h
diff --git a/content/renderer/media/track_audio_renderer.h b/content/renderer/media/track_audio_renderer.h
index 0703746be2383c92495ca3e48455c5d92b67c431..1404b5850c0794823b6a06edf83ba25ff4bd77ff 100644
--- a/content/renderer/media/track_audio_renderer.h
+++ b/content/renderer/media/track_audio_renderer.h
@@ -105,7 +105,7 @@ class CONTENT_EXPORT TrackAudioRenderer
   // Render() is called on the AudioOutputDevice thread and OnRenderError()
   // on the IO thread.
   int Render(media::AudioBus* audio_bus,
-             uint32_t audio_delay_milliseconds,
+             uint32_t frames_delayed,
              uint32_t frames_skipped) override;
   void OnRenderError() override;