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

media/audio/audio_system.h

Index: media/audio/audio_system.h
diff --git a/media/audio/audio_system.h b/media/audio/audio_system.h
index a11b030c742ab22e6b195f2a40388decd7df488c..76319cc2eb75aa1f84c513f030ce9f6729c9e872 100644
--- a/media/audio/audio_system.h
+++ b/media/audio/audio_system.h
@@ -25,8 +25,23 @@
 
   virtual ~AudioSystem();
 
-  // Callback will receive invalid parameters if the device is not found.
+  // Callback may receive invalid parameters, it means the specified device is
+  // not found. This is best-effort: valid parameters do not guarantee existance
+  // of the device.
+  // TODO(olka,tommi): fix all AudioManager implementations to return invalid
+  // parameters if the device is not found.
   virtual void GetInputStreamParameters(
+      const std::string& device_id,
+      OnAudioParamsCallback on_params_cb) const = 0;
+
+  // If media::AudioDeviceDescription::IsDefaultDevice(device_id) is true,
+  // callback will receive the parameters of the default output device.
+  // Callback may receive invalid parameters, it means the specified device is
+  // not found. This is best-effort: valid parameters do not guarantee existance
+  // of the device.
+  // TODO(olka,tommi): fix all AudioManager implementations to return invalid
+  // parameters if the device is not found.
+  virtual void GetOutputStreamParameters(
       const std::string& device_id,
       OnAudioParamsCallback on_params_cb) const = 0;