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..ef04c4ff7ae6b1d24913f4c1b04a44484fab07ca 100644
--- a/media/audio/audio_system.h
+++ b/media/audio/audio_system.h
@@ -30,6 +30,14 @@ class MEDIA_EXPORT AudioSystem {
       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 will receive invalid parameters if the device (default or not) is

[o1ka, 2017/02/14 11:37:03]

guidou@:
AudioOutputAuthorizationHandler will fall back to UnavailableDeviceParameters in
TryToFixAudioParameters(), so the behavior is not changed for authorization.
Do we probably want to change it in the future to notify that the device is not
found? And when we can actually hit it? (Looks like it's if the device
disappeared after enumeration?)

+  // not found.
+  virtual void GetOutputStreamParameters(
+      const std::string& device_id,
+      OnAudioParamsCallback on_params_cb) const = 0;
+
   virtual void HasInputDevices(OnBoolCallback on_has_devices_cb) const = 0;
 
   // Must not be used for anything but stream creation.