Improved AGC update scheme for the audio backend in Chrome

media/audio/pulse/pulse_input.cc

Index: media/audio/pulse/pulse_input.cc
diff --git a/media/audio/pulse/pulse_input.cc b/media/audio/pulse/pulse_input.cc
index 4e48e10ec442d611bdcc2b5e67d78743aaa79780..d0014e9ac2950657c7d9f68165ae226bcb08a135 100644
--- a/media/audio/pulse/pulse_input.cc
+++ b/media/audio/pulse/pulse_input.cc
@@ -246,11 +246,10 @@ void PulseAudioInputStream::ReadData() {
   // Update the AGC volume level once every second. Note that,
   // |volume| is also updated each time SetVolume() is called
   // through IPC by the render-side AGC.
-  // QueryAgcVolume() will trigger a callback to asynchronously update the
-  // |volume_|, we disregard the |normalized_volume| from QueryAgcVolume()
+  // We disregard the |normalized_volume| from GetAgcVolume()
   // and use the value calculated by |volume_|.
   double normalized_volume = 0.0;
-  QueryAgcVolume(&normalized_volume);
+  GetAgcVolume(&normalized_volume);
   normalized_volume = volume_ / GetMaxVolume();
 
   do {