Revert of Move RtcEventLog object from inside VoiceEngine to Call.

webrtc/voice_engine/voe_codec_impl.cc

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 358 matching lines @@
   voe::ChannelOwner ch = _shared->channel_manager().GetChannel(channel);
   voe::Channel* channelPtr = ch.channel();
   if (channelPtr == NULL) {
     _shared->SetLastError(VE_CHANNEL_NOT_VALID, kTraceError,
                           "SetOpusDtx failed to locate channel");
     return -1;
   }
   return channelPtr->SetOpusDtx(enable_dtx);
 }
 
+RtcEventLog* VoECodecImpl::GetEventLog() {
+  return _shared->channel_manager().GetEventLog();
+}
+
 #endif  // WEBRTC_VOICE_ENGINE_CODEC_API
 
 }  // namespace webrtc