AudioConverter: Express delay in frames rather than msec.

media/base/loopback_audio_converter.cc

 // 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.
 
 #include "media/base/loopback_audio_converter.h"
 
 namespace media {
 
 LoopbackAudioConverter::LoopbackAudioConverter(
     const AudioParameters& input_params,
     const AudioParameters& output_params,
     bool disable_fifo)
     : audio_converter_(input_params, output_params, disable_fifo) {}
 
 LoopbackAudioConverter::~LoopbackAudioConverter() {}
 
 double LoopbackAudioConverter::ProvideInput(AudioBus* audio_bus,
-                                            base::TimeDelta buffer_delay) {
-  audio_converter_.ConvertWithDelay(buffer_delay, audio_bus);
+                                            uint32_t frames_delayed) {
+  audio_converter_.ConvertWithDelay(frames_delayed, audio_bus);
   return 1.0;
 }
 
 }  // namespace media