Revert of Switching AudioOutputAuthorizationHandler from using AudioManager interface to AudioSystem one.

content/browser/renderer_host/media/audio_output_authorization_handler.h

Index: content/browser/renderer_host/media/audio_output_authorization_handler.h
diff --git a/content/browser/renderer_host/media/audio_output_authorization_handler.h b/content/browser/renderer_host/media/audio_output_authorization_handler.h
index d7c99fb54bb8978462dd5ac6150e2b558ecadcfb..c0b5640ea1f6dc046a30c9f4dd1a6eb5cfb911d0 100644
--- a/content/browser/renderer_host/media/audio_output_authorization_handler.h
+++ b/content/browser/renderer_host/media/audio_output_authorization_handler.h
@@ -14,12 +14,9 @@
 #include "content/browser/media/media_devices_permission_checker.h"
 #include "content/browser/renderer_host/media/media_stream_manager.h"
 #include "media/audio/audio_device_description.h"
+#include "media/audio/audio_manager.h"
 #include "media/base/audio_parameters.h"
 #include "media/base/output_device_info.h"
-
-namespace media {
-class AudioSystem;
-}
 
 namespace content {
 
@@ -43,7 +40,7 @@
                           const media::AudioParameters& params,
                           const std::string& raw_device_id)>;
 
-  AudioOutputAuthorizationHandler(media::AudioSystem* audio_system,
+  AudioOutputAuthorizationHandler(media::AudioManager* audio_manager,
                                   MediaStreamManager* media_stream_manager,
                                   int render_process_id_,
                                   const std::string& salt);
@@ -87,7 +84,7 @@
       const std::string& raw_device_id,
       const media::AudioParameters& output_params) const;
 
-  media::AudioSystem* audio_system_;
+  media::AudioManager* audio_manager_;
   MediaStreamManager* const media_stream_manager_;
   std::unique_ptr<MediaDevicesPermissionChecker> permission_checker_;
   const int render_process_id_;