Improved AGC update scheme for the audio backend in Chrome

media/audio/virtual_audio_input_stream_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <list>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/message_loop.h"
 #include "base/rand_util.h"
@@ skipping 58 matching lines @@
 
   virtual int OnMoreData(AudioBus* audio_bus,
                          AudioBuffersState audio_buffers) OVERRIDE {
     const int ret = SineWaveAudioSource::OnMoreData(audio_bus, audio_buffers);
     data_pulled_.Signal();
     return ret;
   }
 
   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;
   }
 
   void WaitForDataPulls() {
     for (int i = 0; i < 3; ++i) {
       data_pulled_.Wait();
     }
   }
 
@@ skipping 236 matching lines @@
   }
   RUN_ON_AUDIO_THREAD(Stop);
   for (int i = 0; i < kHalfNumOutputs; ++i) {
     RUN_ON_AUDIO_THREAD(StopAndCloseOneOutputStream);
   }
   RUN_ON_AUDIO_THREAD(Close);
   WaitUntilClosed();
 }
 
 }  // namespace media