Adds proper IPC usage for AudioDevice::GetAudioHardwareBufferSize().

content/renderer/media/audio_device.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/audio_device.h"
 
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
 #include "base/message_loop.h"
 #include "base/time.h"
@@ skipping 195 matching lines @@
 void AudioDevice::Run() {
   audio_thread_->SetThreadPriority(base::kThreadPriority_RealtimeAudio);
 
   int pending_data;
   const int samples_per_ms = static_cast<int>(sample_rate_) / 1000;
   const int bytes_per_ms = channels_ * (bits_per_sample_ / 8) * samples_per_ms;
 
   while ((sizeof(pending_data) == socket_->Receive(&pending_data,
                                                    sizeof(pending_data))) &&
          (pending_data >= 0)) {
-
     // Convert the number of pending bytes in the render buffer
     // into milliseconds.
     audio_delay_milliseconds_ = pending_data / bytes_per_ms;
     FireRenderCallback();
   }
 }
 
 void AudioDevice::FireRenderCallback() {
   TRACE_EVENT0("audio", "AudioDevice::FireRenderCallback");
 
@@ skipping 13 matching lines @@
   static double hardware_sample_rate = 0;
   if (!hardware_sample_rate) {
     RenderThreadImpl::current()->Send(
         new ViewHostMsg_GetHardwareSampleRate(&hardware_sample_rate));
   }
   return hardware_sample_rate;
 }
 
 size_t AudioDevice::GetAudioHardwareBufferSize() {
   // Uses cached value if possible.
-  static size_t buffer_size = 0;
+  static uint32 buffer_size = 0;
 
-  if (!buffer_size)
-    buffer_size = media::GetAudioHardwareBufferSize();
+  if (!buffer_size) {
+    RenderThreadImpl::current()->Send(
+        new ViewHostMsg_GetHardwareBufferSize(&buffer_size));
+  }
 
-  return buffer_size;
+  return static_cast<size_t>(buffer_size);
 }