Pass task runners to AudioManager constructor.

chromecast/media/audio/cast_audio_manager.cc

Index: chromecast/media/audio/cast_audio_manager.cc
diff --git a/chromecast/media/audio/cast_audio_manager.cc b/chromecast/media/audio/cast_audio_manager.cc
index 54cd79454398beafd1e73e8aa929027aaf3ad4d8..46efb40bf936971ea017f2ed156e39d3a7a12c2b 100644
--- a/chromecast/media/audio/cast_audio_manager.cc
+++ b/chromecast/media/audio/cast_audio_manager.cc
@@ -28,8 +28,13 @@ static const int kDefaultOutputBufferSize = 2048;
 namespace chromecast {
 namespace media {
 
-CastAudioManager::CastAudioManager(::media::AudioLogFactory* audio_log_factory)
-    : AudioManagerBase(audio_log_factory) {}
+CastAudioManager::CastAudioManager(
+    scoped_refptr<base::SingleThreadTaskRunner> task_runner,
+    scoped_refptr<base::SingleThreadTaskRunner> worker_task_runner,
+    ::media::AudioLogFactory* audio_log_factory)
+    : AudioManagerBase(std::move(task_runner),
+                       std::move(worker_task_runner),
+                       audio_log_factory) {}
 
 CastAudioManager::~CastAudioManager() {
   Shutdown();