Cleanup AudioDeviceThread to avoid accidental misuse.

content/browser/renderer_host/media/audio_output_delegate_unittest.cc

Index: content/browser/renderer_host/media/audio_output_delegate_unittest.cc
diff --git a/content/browser/renderer_host/media/audio_output_delegate_unittest.cc b/content/browser/renderer_host/media/audio_output_delegate_unittest.cc
index 87462a1b8295da710190215fe8c26d64335311ec..2af816ba84d4e2b6f2f28e4cee85cc1dca5a6254 100644
--- a/content/browser/renderer_host/media/audio_output_delegate_unittest.cc
+++ b/content/browser/renderer_host/media/audio_output_delegate_unittest.cc
@@ -112,7 +112,7 @@ class AudioOutputDelegateTest : public testing::Test {
     audio_thread_ = base::MakeUnique<AudioDeviceThread>();
 
     audio_manager_.reset(new media::FakeAudioManager(
-        audio_thread_->GetTaskRunner(), audio_thread_->worker_task_runner(),
+        audio_thread_->task_runner(), audio_thread_->worker_task_runner(),
         &log_factory_));
     media_stream_manager_ =
         base::MakeUnique<MediaStreamManager>(audio_manager_.get());