Express audio delay more precisely in frames rather than milliseconds.

content/renderer/media/renderer_webaudiodevice_impl.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 CONTENT_RENDERER_MEDIA_RENDERER_WEBAUDIODEVICE_IMPL_H_
 #define CONTENT_RENDERER_MEDIA_RENDERER_WEBAUDIODEVICE_IMPL_H_
 
 #include <stdint.h>
 
 #include "base/cancelable_callback.h"
@@ skipping 27 matching lines @@
                              const url::Origin& security_origin);
   ~RendererWebAudioDeviceImpl() override;
 
   // blink::WebAudioDevice implementation.
   void start() override;
   void stop() override;
   double sampleRate() override;
 
   // AudioRendererSink::RenderCallback implementation.
   int Render(media::AudioBus* dest,
-             uint32_t audio_delay_milliseconds,
+             uint32_t frames_delayed,
              uint32_t frames_skipped) override;
 
   void OnRenderError() override;
 
  private:
   const media::AudioParameters params_;
 
   // Weak reference to the callback into WebKit code.
   blink::WebAudioDevice::RenderCallback* const client_callback_;
 
@@ skipping 33 matching lines @@
 
   // Security origin, used to check permissions for |output_device_|.
   url::Origin security_origin_;
 
   DISALLOW_COPY_AND_ASSIGN(RendererWebAudioDeviceImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_RENDERER_WEBAUDIODEVICE_IMPL_H_