Hooked up RtcEventLog. It lives in Voice Engine and pointers are propagated to ACM and Call.

webrtc/voice_engine/voe_base_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 406 matching lines @@
     return -1;
   } else if (channel_owner->channel()->Init() != 0) {
     shared_->SetLastError(
         VE_CHANNEL_NOT_CREATED, kTraceError,
         "CreateChannel() failed to initialize channel. Destroying"
         " channel.");
     shared_->channel_manager().DestroyChannel(
         channel_owner->channel()->ChannelId());
     return -1;
   }
-
   return channel_owner->channel()->ChannelId();
 }
 
 int VoEBaseImpl::DeleteChannel(int channel) {
   CriticalSectionScoped cs(shared_->crit_sec());
   if (!shared_->statistics().Initialized()) {
     shared_->SetLastError(VE_NOT_INITED, kTraceError);
     return -1;
   }
 
@@ skipping 430 matching lines @@
     shared_->SetLastError(VE_CHANNEL_NOT_VALID, kTraceError,
         "AssociateSendChannel() failed to locate accociate_send_channel");
     return -1;
   }
 
   channel_ptr->set_associate_send_channel(ch);
   return 0;
 }
 
 }  // namespace webrtc