Pass task runners to AudioManager constructor.

chromecast/media/audio/cast_audio_manager_factory.cc

Index: chromecast/media/audio/cast_audio_manager_factory.cc
diff --git a/chromecast/media/audio/cast_audio_manager_factory.cc b/chromecast/media/audio/cast_audio_manager_factory.cc
index 7151f2139f01389d9b0f3f2cead7e9e1d9fb594c..b6d32da2ca6d76ff42948100461d9f6b93c62e3d 100644
--- a/chromecast/media/audio/cast_audio_manager_factory.cc
+++ b/chromecast/media/audio/cast_audio_manager_factory.cc
@@ -13,9 +13,14 @@ CastAudioManagerFactory::CastAudioManagerFactory() {}
 
 CastAudioManagerFactory::~CastAudioManagerFactory() {}
 
-::media::AudioManager* CastAudioManagerFactory::CreateInstance(
+scoped_ptr<::media::AudioManager, ::media::AudioManagerDeleter>
+CastAudioManagerFactory::CreateInstance(
+    scoped_refptr<base::SingleThreadTaskRunner> task_runner,
+    scoped_refptr<base::SingleThreadTaskRunner> worker_task_runner,
     ::media::AudioLogFactory* audio_log_factory) {
-  return new CastAudioManager(audio_log_factory);
+  return scoped_ptr<::media::AudioManager, ::media::AudioManagerDeleter>(
+      new CastAudioManager(std::move(task_runner),
+                           std::move(worker_task_runner), audio_log_factory));
 }
 
 }  // namespace media