Getting rid of AudioHardwareConfig and its synchronous IPC.

content/renderer/renderer_blink_platform_impl.cc

Index: content/renderer/renderer_blink_platform_impl.cc
diff --git a/content/renderer/renderer_blink_platform_impl.cc b/content/renderer/renderer_blink_platform_impl.cc
index a387813966067bd2b678938279ea0595a69a8675..d5f589ddad658c57c95805d39c6244985d99105b 100644
--- a/content/renderer/renderer_blink_platform_impl.cc
+++ b/content/renderer/renderer_blink_platform_impl.cc
@@ -59,6 +59,7 @@
 #include "content/renderer/dom_storage/webstoragenamespace_impl.h"
 #include "content/renderer/gamepad_shared_memory_reader.h"
 #include "content/renderer/media/audio_decoder.h"
+#include "content/renderer/media/audio_device_factory.h"
 #include "content/renderer/media/canvas_capture_handler.h"
 #include "content/renderer/media/html_audio_element_capturer_source.h"
 #include "content/renderer/media/html_video_element_capturer_source.h"
@@ -80,7 +81,6 @@
 #include "gpu/ipc/common/gpu_stream_constants.h"
 #include "ipc/ipc_sync_message_filter.h"
 #include "media/audio/audio_output_device.h"
-#include "media/base/audio_hardware_config.h"
 #include "media/base/mime_util.h"
 #include "media/blink/webcontentdecryptionmodule_impl.h"
 #include "media/filters/stream_parser_factory.h"
@@ -686,18 +686,24 @@ bool RendererBlinkPlatformImpl::isThreadedAnimationEnabled() {
 }
 
 double RendererBlinkPlatformImpl::audioHardwareSampleRate() {
-  RenderThreadImpl* thread = RenderThreadImpl::current();
-  return thread->GetAudioHardwareConfig()->GetOutputSampleRate();
+  return AudioDeviceFactory::GetOutputDeviceInfo(MSG_ROUTING_NONE, 0,
+                                                 std::string(), url::Origin())
+      .output_params()
+      .sample_rate();
 }
 
 size_t RendererBlinkPlatformImpl::audioHardwareBufferSize() {
-  RenderThreadImpl* thread = RenderThreadImpl::current();
-  return thread->GetAudioHardwareConfig()->GetOutputBufferSize();
+  return AudioDeviceFactory::GetOutputDeviceInfo(MSG_ROUTING_NONE, 0,
+                                                 std::string(), url::Origin())
+      .output_params()
+      .frames_per_buffer();
 }
 
 unsigned RendererBlinkPlatformImpl::audioHardwareOutputChannels() {
-  RenderThreadImpl* thread = RenderThreadImpl::current();
-  return thread->GetAudioHardwareConfig()->GetOutputChannels();
+  return AudioDeviceFactory::GetOutputDeviceInfo(MSG_ROUTING_NONE, 0,
+                                                 std::string(), url::Origin())
+      .output_params()
+      .channels();
 }
 
 WebDatabaseObserver* RendererBlinkPlatformImpl::databaseObserver() {