Enable audio streams to send padding.

webrtc/modules/rtp_rtcp/source/rtp_rtcp_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 599 matching lines @@
     const RTPExtensionType type,
     const uint8_t id) {
   return rtp_sender_.RegisterRtpHeaderExtension(type, id);
 }
 
 int32_t ModuleRtpRtcpImpl::DeregisterSendRtpHeaderExtension(
     const RTPExtensionType type) {
   return rtp_sender_.DeregisterRtpHeaderExtension(type);
 }
 
+bool ModuleRtpRtcpImpl::HasBweExtensions() const {
+  return rtp_sender_.IsRtpHeaderExtensionRegistered(
+             kRtpExtensionTransportSequenceNumber) ||
+         rtp_sender_.IsRtpHeaderExtensionRegistered(
+             kRtpExtensionAbsoluteSendTime) ||
+         rtp_sender_.IsRtpHeaderExtensionRegistered(
+             kRtpExtensionTransmissionTimeOffset);
+}
+
 // (TMMBR) Temporary Max Media Bit Rate.
 bool ModuleRtpRtcpImpl::TMMBR() const {
   return rtcp_sender_.TMMBR();
 }
 
 void ModuleRtpRtcpImpl::SetTMMBRStatus(const bool enable) {
   rtcp_sender_.SetTMMBRStatus(enable);
 }
 
 void ModuleRtpRtcpImpl::SetTmmbn(std::vector<rtcp::TmmbItem> bounding_set) {
@@ skipping 275 matching lines @@
 StreamDataCountersCallback*
     ModuleRtpRtcpImpl::GetSendChannelRtpStatisticsCallback() const {
   return rtp_sender_.GetRtpStatisticsCallback();
 }
 
 void ModuleRtpRtcpImpl::SetVideoBitrateAllocation(
     const BitrateAllocation& bitrate) {
   rtcp_sender_.SetVideoBitrateAllocation(bitrate);
 }
 }  // namespace webrtc