Prepare the AudioSendStream to be hooked up to send-side BWE.

talk/media/webrtc/webrtcvoiceengine.cc

 /*
  * libjingle
  * Copyright 2004 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 512 matching lines @@
                          kRtpAudioLevelHeaderExtensionDefaultId));
   rtp_header_extensions_.push_back(
       RtpHeaderExtension(kRtpAbsoluteSenderTimeHeaderExtension,
                          kRtpAbsoluteSenderTimeHeaderExtensionDefaultId));
   if (webrtc::field_trial::FindFullName("WebRTC-SendSideBwe") == "Enabled") {
     rtp_header_extensions_.push_back(RtpHeaderExtension(
         kRtpTransportSequenceNumberHeaderExtension,
         kRtpTransportSequenceNumberHeaderExtensionDefaultId));
   }
   options_ = GetDefaultEngineOptions();
+  voe_config_.Set<webrtc::VoicePacing>(new webrtc::VoicePacing(true));
 }
 
 WebRtcVoiceEngine::~WebRtcVoiceEngine() {
   RTC_DCHECK(worker_thread_checker_.CalledOnValidThread());
   LOG(LS_VERBOSE) << "WebRtcVoiceEngine::~WebRtcVoiceEngine";
   if (adm_) {
     voe_wrapper_.reset();
     adm_->Release();
     adm_ = NULL;
   }
@@ skipping 2094 matching lines @@
     }
   } else {
     LOG(LS_INFO) << "Stopping playout for channel #" << channel;
     engine()->voe()->base()->StopPlayout(channel);
   }
   return true;
 }
 }  // namespace cricket
 
 #endif  // HAVE_WEBRTC_VOICE