Avoids irregular OnMoreData callbacks on Windows using Core Audio

content/test/webrtc_audio_device_test.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/test/webrtc_audio_device_test.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/compiler_specific.h"
 #include "base/file_util.h"
@@ skipping 264 matching lines @@
 }
 
 void WebRTCAudioDeviceTest::OnGetHardwareInputChannelLayout(
     media::ChannelLayout* layout) {
   EXPECT_TRUE(audio_util_callback_);
   *layout = !audio_util_callback_ ? media::CHANNEL_LAYOUT_NONE :
       audio_util_callback_->GetAudioInputHardwareChannelLayout(
           media::AudioManagerBase::kDefaultDeviceId);
 }
 
+void WebRTCAudioDeviceTest::OnGetHardwareBufferSize(uint32* buffer_size) {
+  EXPECT_TRUE(audio_util_callback_);
+  *buffer_size = audio_util_callback_ ?
+      audio_util_callback_->GetAudioOutputBufferSize() : 0;
+}
+
 // IPC::Listener implementation.
 bool WebRTCAudioDeviceTest::OnMessageReceived(const IPC::Message& message) {
   if (render_thread_) {
     IPC::ChannelProxy::MessageFilter* filter =
         render_thread_->audio_input_message_filter();
     if (filter->OnMessageReceived(message))
       return true;
 
     filter = render_thread_->audio_message_filter();
     if (filter->OnMessageReceived(message))
@@ skipping 14 matching lines @@
 
   bool handled ALLOW_UNUSED = true;
   bool message_is_ok = true;
   IPC_BEGIN_MESSAGE_MAP_EX(WebRTCAudioDeviceTest, message, message_is_ok)
     IPC_MESSAGE_HANDLER(ViewHostMsg_GetHardwareSampleRate,
                         OnGetHardwareSampleRate)
     IPC_MESSAGE_HANDLER(ViewHostMsg_GetHardwareInputSampleRate,
                         OnGetHardwareInputSampleRate)
     IPC_MESSAGE_HANDLER(ViewHostMsg_GetHardwareInputChannelLayout,
                         OnGetHardwareInputChannelLayout)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_GetHardwareBufferSize,
+                        OnGetHardwareBufferSize)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP_EX()
 
   EXPECT_TRUE(message_is_ok);
 
   return true;
 }
 
 // Posts a final task to the IO message loop and waits for completion.
 void WebRTCAudioDeviceTest::WaitForIOThreadCompletion() {
@@ skipping 42 matching lines @@
 int WebRTCTransportImpl::SendPacket(int channel, const void* data, int len) {
   return network_->ReceivedRTPPacket(channel, data, len);
 }
 
 int WebRTCTransportImpl::SendRTCPPacket(int channel, const void* data,
                                         int len) {
   return network_->ReceivedRTCPPacket(channel, data, len);
 }
 
 }  // namespace content