Refactor the Get*Hardware* routines a bit.

content/renderer/media/webrtc_audio_device_impl.cc

 // Copyright (c) 2011 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/webrtc_audio_device_impl.h"
 
 #include "base/bind.h"
 #include "base/string_util.h"
 #include "base/win/windows_version.h"
-#include "content/common/view_messages.h"
+#include "content/renderer/media/audio_hardware.h"
 #include "content/renderer/render_thread_impl.h"
 #include "media/audio/audio_util.h"
 
 static const int64 kMillisecondsBetweenProcessCalls = 5000;
 static const char kVersion[] = "WebRTC AudioDevice 1.0.0.Chrome";
 
-static int GetAudioInputHardwareSampleRate() {
-  static double input_sample_rate = 0;
-  if (!input_sample_rate) {
-    RenderThreadImpl::current()->Send(
-        new ViewHostMsg_GetHardwareInputSampleRate(&input_sample_rate));
-  }
-  return static_cast<int>(input_sample_rate);
-}
-
 WebRtcAudioDeviceImpl::WebRtcAudioDeviceImpl()
     : ref_count_(0),
       render_loop_(base::MessageLoopProxy::current()),
       audio_transport_callback_(NULL),
       input_buffer_size_(0),
       output_buffer_size_(0),
       input_channels_(0),
       output_channels_(0),
       input_sample_rate_(0),
       output_sample_rate_(0),
@@ skipping 247 matching lines @@
     return 0;
 
   DCHECK(!audio_input_device_);
   DCHECK(!audio_output_device_);
   DCHECK(!input_buffer_.get());
   DCHECK(!output_buffer_.get());
 
   // Ask the browser for the default audio output hardware sample-rate.
   // This request is based on a synchronous IPC message.
   int output_sample_rate =
-      static_cast<int>(AudioDevice::GetAudioHardwareSampleRate());
+      static_cast<int>(audio_hardware::GetOutputSampleRate());
   DVLOG(1) << "Audio output hardware sample rate: " << output_sample_rate;
 
   // Ask the browser for the default audio input hardware sample-rate.
   // This request is based on a synchronous IPC message.
-  int input_sample_rate = GetAudioInputHardwareSampleRate();
+  int input_sample_rate =
+      static_cast<int>(audio_hardware::GetInputSampleRate());
   DVLOG(1) << "Audio input hardware sample rate: " << input_sample_rate;
 
   int input_channels = 0;
   int output_channels = 0;
 
   size_t input_buffer_size = 0;
   size_t output_buffer_size = 0;
 
 // Windows
 #if defined(OS_WIN)
@@ skipping 664 matching lines @@
 }
 
 int32_t WebRtcAudioDeviceImpl::GetLoudspeakerStatus(bool* enabled) const {
   NOTIMPLEMENTED();
   return -1;
 }
 
 void WebRtcAudioDeviceImpl::SetSessionId(int session_id) {
   session_id_ = session_id;
 }