Getting rid of AudioHardwareConfig and its synchronous IPC.

content/renderer/render_thread_impl.cc

Index: content/renderer/render_thread_impl.cc
diff --git a/content/renderer/render_thread_impl.cc b/content/renderer/render_thread_impl.cc
index 660b52bedbb249e4e9c8877f6dd009aa38083e2b..d4cb262150b20a9471ee5ca52c736e78ab1bf4ca 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -133,7 +133,6 @@
 #include "ipc/ipc_channel_handle.h"
 #include "ipc/ipc_channel_mojo.h"
 #include "ipc/ipc_platform_file.h"
-#include "media/base/audio_hardware_config.h"
 #include "media/base/media.h"
 #include "media/renderers/gpu_video_accelerator_factories.h"
 #include "mojo/common/common_type_converters.h"
@@ -1539,20 +1538,6 @@ AudioRendererMixerManager* RenderThreadImpl::GetAudioRendererMixerManager() {
   return audio_renderer_mixer_manager_.get();
 }
 
-media::AudioHardwareConfig* RenderThreadImpl::GetAudioHardwareConfig() {
-  if (!audio_hardware_config_) {
-    media::AudioParameters input_params;
-    media::AudioParameters output_params;
-    Send(new ViewHostMsg_GetAudioHardwareConfig(
-        &input_params, &output_params));
-
-    audio_hardware_config_.reset(new media::AudioHardwareConfig(
-        input_params, output_params));
-  }
-
-  return audio_hardware_config_.get();
-}
-
 base::WaitableEvent* RenderThreadImpl::GetShutdownEvent() {
   return ChildProcess::current()->GetShutDownEvent();
 }