Improved AGC update scheme for the audio backend in Chrome

media/audio/virtual_audio_input_stream_unittest.cc

Index: media/audio/virtual_audio_input_stream_unittest.cc
diff --git a/media/audio/virtual_audio_input_stream_unittest.cc b/media/audio/virtual_audio_input_stream_unittest.cc
index 0c886723031d9270371b3f40a94b7efd51cf4f8f..4795e6490ef3872f2621bb674b4642df6f2157a0 100644
--- a/media/audio/virtual_audio_input_stream_unittest.cc
+++ b/media/audio/virtual_audio_input_stream_unittest.cc
@@ -76,9 +76,10 @@ class TestAudioSource : public SineWaveAudioSource {
 
   virtual int OnMoreIOData(AudioBus* source,
                            AudioBus* dest,
-                           AudioBuffersState audio_buffers) OVERRIDE {
+                           AudioBuffersState audio_buffers,
+                           double input_volume) OVERRIDE {
     const int ret =
-        SineWaveAudioSource::OnMoreIOData(source, dest, audio_buffers);
+        SineWaveAudioSource::OnMoreIOData(source, dest, audio_buffers, 1.0);
     data_pulled_.Signal();
     return ret;
   }