Switch OnMoreData() to use AudioBus.

media/audio/audio_output_proxy_unittest.cc

Index: media/audio/audio_output_proxy_unittest.cc
diff --git a/media/audio/audio_output_proxy_unittest.cc b/media/audio/audio_output_proxy_unittest.cc
index 035a64e4c020639e432601bb37222cd85b188784..b928b7ce677d831b01dfedc87daf68c71b28b255 100644
--- a/media/audio/audio_output_proxy_unittest.cc
+++ b/media/audio/audio_output_proxy_unittest.cc
@@ -27,6 +27,7 @@ using ::testing::Mock;
 using ::testing::NotNull;
 using ::testing::Return;
 using ::testing::SetArrayArgument;
+using media::AudioBus;
 using media::AudioBuffersState;
 using media::AudioInputStream;
 using media::AudioManager;
@@ -78,8 +79,8 @@ class MockAudioManager : public AudioManager {
 
 class MockAudioSourceCallback : public AudioOutputStream::AudioSourceCallback {
  public:
-  MOCK_METHOD3(OnMoreData, uint32(uint8* dest, uint32 max_size,
-                                  AudioBuffersState buffers_state));
+  MOCK_METHOD2(OnMoreData, int(AudioBus* audio_bus,
+                               AudioBuffersState buffers_state));
   MOCK_METHOD2(OnError, void(AudioOutputStream* stream, int code));
 };