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 283f248170f37b6a178b798feaf59c5b244e28f0..0247c515651034846f639bd91e1afd37e4c75891 100644
--- a/media/mojo/services/test_mojo_media_client.cc
+++ b/media/mojo/services/test_mojo_media_client.cc
@@ -4,6 +4,7 @@
 
 #include "media/mojo/services/test_mojo_media_client.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"
@@ -24,12 +25,12 @@ 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();
+  }
 
   audio_hardware_config_.reset(new AudioHardwareConfig(
       audio_manager->GetInputStreamParameters(