Switching AudioInputDeviceManager from using AudioManager interface to AudioSystem one.

content/browser/renderer_host/media/media_stream_manager.cc

Index: content/browser/renderer_host/media/media_stream_manager.cc
diff --git a/content/browser/renderer_host/media/media_stream_manager.cc b/content/browser/renderer_host/media/media_stream_manager.cc
index 963c9c72379beaac843b35c259fc4b2fd629a66a..a893301e86cf9442bae66a67715464c2f39fb049 100644
--- a/content/browser/renderer_host/media/media_stream_manager.cc
+++ b/content/browser/renderer_host/media/media_stream_manager.cc
@@ -1235,8 +1235,7 @@ void MediaStreamManager::InitializeDeviceManagersOnIOThread() {
   tracked_objects::ScopedTracker tracking_profile2(
       FROM_HERE_WITH_EXPLICIT_FUNCTION(
           "457525 MediaStreamManager::InitializeDeviceManagersOnIOThread 2"));
-  audio_input_device_manager_ =
-      new AudioInputDeviceManager(audio_system_->GetAudioManager());
+  audio_input_device_manager_ = new AudioInputDeviceManager(audio_system_);
   audio_input_device_manager_->RegisterListener(this);
 
   // TODO(dalecurtis): Remove ScopedTracker below once crbug.com/457525 is