Caching AudioOutputDevice instances in mixer manager

media/mojo/services/test_mojo_media_client.cc

Index: media/mojo/services/test_mojo_media_client.cc
diff --git a/media/mojo/services/test_mojo_media_client.cc b/media/mojo/services/test_mojo_media_client.cc
index 592213a797afd8046dc4b37028d0d61d8c7efb89..97a8098d1793da2cc5fb6733edbb5436e01193ca 100644
--- a/media/mojo/services/test_mojo_media_client.cc
+++ b/media/mojo/services/test_mojo_media_client.cc
@@ -37,10 +37,6 @@ void TestMojoMediaClient::Initialize() {
     base::RunLoop().RunUntilIdle();
   }
 
-  audio_hardware_config_.reset(new AudioHardwareConfig(
-      audio_manager->GetInputStreamParameters(
-          AudioDeviceDescription::kDefaultDeviceId),
-      audio_manager->GetDefaultOutputStreamParameters()));
 }
 
 void TestMojoMediaClient::WillQuit() {
@@ -56,8 +52,7 @@ std::unique_ptr<RendererFactory> TestMojoMediaClient::CreateRendererFactory(
     const scoped_refptr<MediaLog>& media_log) {
   DVLOG(1) << __FUNCTION__;
   return base::WrapUnique(new DefaultRendererFactory(
-      media_log, nullptr, DefaultRendererFactory::GetGpuFactoriesCB(),
-      *audio_hardware_config_));
+      media_log, nullptr, DefaultRendererFactory::GetGpuFactoriesCB()));
 }
 
 AudioRendererSink* TestMojoMediaClient::CreateAudioRendererSink() {