Move RtcEventLog object from inside VoiceEngine to Call.

webrtc/voice_engine/channel_proxy.h

Index: webrtc/voice_engine/channel_proxy.h
diff --git a/webrtc/voice_engine/channel_proxy.h b/webrtc/voice_engine/channel_proxy.h
index 3461cf3e782046160d76b6ada6fddf2a5c4d9cd5..145df82d4cdf536978bf623635982266a45ba78c 100644
--- a/webrtc/voice_engine/channel_proxy.h
+++ b/webrtc/voice_engine/channel_proxy.h
@@ -23,6 +23,7 @@ namespace webrtc {
 
 class AudioSinkInterface;
 class PacketRouter;
+class RtcEventLog;
 class RtpPacketSender;
 class TransportFeedbackObserver;
 
@@ -72,6 +73,8 @@ class ChannelProxy {
 
   virtual void SetSink(std::unique_ptr<AudioSinkInterface> sink);
 
+  virtual void SetRtcEventLog(RtcEventLog* event_log);
+
  private:
   Channel* channel() const;