AudioConverter: Express delay in frames rather than msec.

media/base/audio_renderer_mixer_input.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.
 //
 // THREAD SAFETY
 //
 // This class is generally not thread safe. Callers should ensure thread safety.
 // For instance, the |sink_lock_| in WebAudioSourceProvider synchronizes access
 // to this object across the main thread (for WebAudio APIs) and the
 // media thread (for HTMLMediaElement APIs).
@@ skipping 61 matching lines @@
 
   // Protect |volume_|, accessed by separate threads in ProvideInput() and
   // SetVolume().
   base::Lock volume_lock_;
 
   bool started_;
   bool playing_;
   double volume_;
 
   // AudioConverter::InputCallback implementation.
-  double ProvideInput(AudioBus* audio_bus,
-                      base::TimeDelta buffer_delay) override;
+  double ProvideInput(AudioBus* audio_bus, uint32_t frames_delayed) override;
 
   // Callbacks provided during construction which allow AudioRendererMixerInput
   // to retrieve a mixer during Initialize() and notify when it's done with it.
   const GetMixerCB get_mixer_cb_;
   const RemoveMixerCB remove_mixer_cb_;
 
   // AudioParameters received during Initialize().
   AudioParameters params_;
 
   // ID of hardware device to use
@@ skipping 15 matching lines @@
   OutputDeviceStatusCB pending_switch_callback_;
   std::string pending_switch_device_id_;
   url::Origin pending_switch_security_origin_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioRendererMixerInput);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_AUDIO_RENDERER_MIXER_INPUT_H_