Move RtcEventLog object from inside VoiceEngine to Call.

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 10c88212024aa2ea911c09ccb97bcb2fd15ca65e..08a525b1997ec9f6f06c1cd1b9946c0bba4aeb8a 100644
--- a/webrtc/voice_engine/channel_proxy.cc
+++ b/webrtc/voice_engine/channel_proxy.cc
@@ -158,6 +158,11 @@ void ChannelProxy::SetSink(std::unique_ptr<AudioSinkInterface> sink) {
   channel()->SetSink(std::move(sink));
 }
 
+void ChannelProxy::SetRtcEventLog(RtcEventLog* event_log) {
+  RTC_DCHECK(thread_checker_.CalledOnValidThread());
+  channel()->SetRtcEventLog(event_log);
+}
+
 Channel* ChannelProxy::channel() const {
   RTC_DCHECK(channel_owner_.channel());
   return channel_owner_.channel();