Move RtcEventLog object from inside VoiceEngine to Call.

webrtc/voice_engine/include/voe_codec.h

Index: webrtc/voice_engine/include/voe_codec.h
diff --git a/webrtc/voice_engine/include/voe_codec.h b/webrtc/voice_engine/include/voe_codec.h
index 6c4fb38a2faf4fa18093ba0bbca2cd85853d3c63..5d94ac27365a91fa3df47901f28ad66422ab7b4f 100644
--- a/webrtc/voice_engine/include/voe_codec.h
+++ b/webrtc/voice_engine/include/voe_codec.h
@@ -35,7 +35,6 @@
 
 namespace webrtc {
 
-class RtcEventLog;
 class VoiceEngine;
 
 class WEBRTC_DLLEXPORT VoECodec {
@@ -132,10 +131,6 @@ class WEBRTC_DLLEXPORT VoECodec {
   // success, and -1 if failed.
   virtual int SetOpusDtx(int channel, bool enable_dtx) = 0;
 
-  // Get a pointer to the event logging object associated with this Voice
-  // Engine. This pointer will remain valid until VoiceEngine is destroyed.
-  virtual RtcEventLog* GetEventLog() = 0;
-
  protected:
   VoECodec() {}
   virtual ~VoECodec() {}