Remove VoEVolumeControl interface.

webrtc/test/mock_voe_channel_proxy.h

Index: webrtc/test/mock_voe_channel_proxy.h
diff --git a/webrtc/test/mock_voe_channel_proxy.h b/webrtc/test/mock_voe_channel_proxy.h
index 58fddb049c42f59d43dd0e196977f2f0e86a5839..9aeb2d1b3a1f086f122791a80cfe411fb91b5ae6 100644
--- a/webrtc/test/mock_voe_channel_proxy.h
+++ b/webrtc/test/mock_voe_channel_proxy.h
@@ -42,8 +42,8 @@ class MockVoEChannelProxy : public voe::ChannelProxy {
   MOCK_CONST_METHOD0(GetRemoteRTCPReportBlocks, std::vector<ReportBlock>());
   MOCK_CONST_METHOD0(GetNetworkStatistics, NetworkStatistics());
   MOCK_CONST_METHOD0(GetDecodingCallStatistics, AudioDecodingCallStats());
-  MOCK_CONST_METHOD0(GetSpeechOutputLevel, int32_t());
-  MOCK_CONST_METHOD0(GetSpeechOutputLevelFullRange, int32_t());
+  MOCK_CONST_METHOD0(GetSpeechOutputLevel, int());
+  MOCK_CONST_METHOD0(GetSpeechOutputLevelFullRange, int());
   MOCK_CONST_METHOD0(GetDelayEstimate, uint32_t());
   MOCK_METHOD2(SetSendTelephoneEventPayloadType, bool(int payload_type,
                                                       int payload_frequency));