Remove usage of VoEVolumeControl from WVoE and Audio[Send|Receive]Stream.

webrtc/voice_engine/channel_proxy.cc

Index: webrtc/voice_engine/channel_proxy.cc
diff --git a/webrtc/voice_engine/channel_proxy.cc b/webrtc/voice_engine/channel_proxy.cc
index 5538d9ee9e026255c25f2198de2373fe056b3326..ca1d3596c888191dbb4a04b99427080d7220f855 100644
--- a/webrtc/voice_engine/channel_proxy.cc
+++ b/webrtc/voice_engine/channel_proxy.cc
@@ -128,6 +128,14 @@ AudioDecodingCallStats ChannelProxy::GetDecodingCallStatistics() const {
   return stats;
 }
 
+int32_t ChannelProxy::GetSpeechOutputLevel() const {
+  RTC_DCHECK(worker_thread_checker_.CalledOnValidThread());
+  uint32_t level = 0;
+  int error = channel()->GetSpeechOutputLevel(level);
+  RTC_DCHECK_EQ(0, error);
+  return static_cast<int32_t>(level);
+}
+
 int32_t ChannelProxy::GetSpeechOutputLevelFullRange() const {
   RTC_DCHECK(worker_thread_checker_.CalledOnValidThread());
   uint32_t level = 0;