Make AudioParameters a class instead of a struct

content/renderer/media/renderer_webaudiodevice_impl.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 "content/renderer/media/renderer_webaudiodevice_impl.h"
 
 using WebKit::WebAudioDevice;
 using WebKit::WebVector;
 
-RendererWebAudioDeviceImpl::RendererWebAudioDeviceImpl(size_t buffer_size,
-    int channels, double sample_rate, WebAudioDevice::RenderCallback* callback)
+RendererWebAudioDeviceImpl::RendererWebAudioDeviceImpl(
+    const AudioParameters& params, WebAudioDevice::RenderCallback* callback)
     : is_running_(false),
       client_callback_(callback) {
-  audio_device_ = new AudioDevice(buffer_size, channels, sample_rate, this);
+  audio_device_ = new AudioDevice(params, this);
 }
 
 RendererWebAudioDeviceImpl::~RendererWebAudioDeviceImpl() {
   stop();
 }
 
 void RendererWebAudioDeviceImpl::start() {
   if (!is_running_) {
     audio_device_->Start();
     is_running_ = true;
@@ skipping 23 matching lines @@
       web_audio_data[i] = audio_data[i];
 
     client_callback_->render(web_audio_data, number_of_frames);
   }
   return number_of_frames;
 }
 
 void RendererWebAudioDeviceImpl::OnRenderError() {
   // TODO(crogers): implement error handling.
 }