Pass task runners to AudioManager constructor.

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 8dbd843c88ab56edbc30afcf88c4097e1b77e677..6388e5303033a92c57150a3fcf04ef669644c8d8 100644
--- a/media/mojo/services/test_mojo_media_client.cc
+++ b/media/mojo/services/test_mojo_media_client.cc
@@ -5,6 +5,8 @@
 #include "media/mojo/services/test_mojo_media_client.h"
 
 #include "base/memory/ptr_util.h"
+#include "base/run_loop.h"
+#include "base/thread_task_runner_handle.h"
 #include "media/audio/audio_manager_base.h"
 #include "media/audio/audio_output_stream_sink.h"
 #include "media/base/audio_hardware_config.h"
@@ -25,12 +27,14 @@ void TestMojoMediaClient::Initialize() {
   // TODO(dalecurtis): We should find a single owner per process for the audio
   // manager or make it a lazy instance.  It's not safe to call Get()/Create()
   // across multiple threads...
-  //
-  // TODO(dalecurtis): Eventually we'll want something other than a fake audio
-  // log factory here too.  We should probably at least DVLOG() such info.
   AudioManager* audio_manager = AudioManager::Get();
-  if (!audio_manager)
-    audio_manager = media::AudioManager::Create(&fake_audio_log_factory_);
+  if (!audio_manager) {
+    audio_manager_ = media::AudioManager::CreateForTesting(
+        base::ThreadTaskRunnerHandle::Get());
+    audio_manager = audio_manager_.get();
+    // Flush the message loop to ensure that the audio manager is initialized.
+    base::RunLoop().RunUntilIdle();
+  }
 
   audio_hardware_config_.reset(new AudioHardwareConfig(
       audio_manager->GetInputStreamParameters(
@@ -38,6 +42,15 @@ void TestMojoMediaClient::Initialize() {
       audio_manager->GetDefaultOutputStreamParameters()));
 }
 
+void TestMojoMediaClient::WillQuit() {
+  DVLOG(1) << __FUNCTION__;
+  // AudioManager destructor requires MessageLoop.
+  // Destroy it before the message loop goes away.
+  audio_manager_.reset();
+  // Flush the message loop to ensure that the audio manager is destroyed.
+  base::RunLoop().RunUntilIdle();
+}
+
 std::unique_ptr<RendererFactory> TestMojoMediaClient::CreateRendererFactory(
     const scoped_refptr<MediaLog>& media_log) {
   DVLOG(1) << __FUNCTION__;