Express audio delay more precisely in frames rather than milliseconds.

media/base/audio_renderer_sink.h

 // 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.
 
 #ifndef MEDIA_BASE_AUDIO_RENDERER_SINK_H_
 #define MEDIA_BASE_AUDIO_RENDERER_SINK_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 21 matching lines @@
 
 class AudioRendererSink
     : public base::RefCountedThreadSafe<media::AudioRendererSink> {
  public:
   class RenderCallback {
    public:
     // Attempts to completely fill all channels of |dest|, returns actual
     // number of frames filled. |frames_skipped| contains the number of frames
     // the consumer has skipped, if any.
     virtual int Render(AudioBus* dest,
-                       uint32_t audio_delay_milliseconds,
+                       uint32_t frames_delayed,
                        uint32_t frames_skipped) = 0;
 
     // Signals an error has occurred.
     virtual void OnRenderError() = 0;
 
    protected:
     virtual ~RenderCallback() {}
   };
 
   // Sets important information about the audio stream format.
@@ skipping 36 matching lines @@
 // this.
 
 class RestartableAudioRendererSink : public AudioRendererSink {
  protected:
   ~RestartableAudioRendererSink() override {}
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_AUDIO_RENDERER_SINK_H_