Revert of Remove ignored return code from modules.

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 100 matching lines @@
 
 // Returns the number of milliseconds until the module want a worker thread
 // to call Process.
 int64_t ModuleRtpRtcpImpl::TimeUntilNextProcess() {
   const int64_t now = clock_->TimeInMilliseconds();
   const int64_t kRtpRtcpMaxIdleTimeProcessMs = 5;
   return kRtpRtcpMaxIdleTimeProcessMs - (now - last_process_time_);
 }
 
 // Process any pending tasks such as timeouts (non time critical events).
-void ModuleRtpRtcpImpl::Process() {
+int32_t ModuleRtpRtcpImpl::Process() {
   const int64_t now = clock_->TimeInMilliseconds();
   last_process_time_ = now;
 
   const int64_t kRtpRtcpBitrateProcessTimeMs = 10;
   if (now >= last_bitrate_process_time_ + kRtpRtcpBitrateProcessTimeMs) {
     rtp_sender_.ProcessBitrate();
     last_bitrate_process_time_ = now;
   }
 
   const int64_t kRtpRtcpRttProcessTimeMs = 1000;
@@ skipping 63 matching lines @@
     RTCPSender::FeedbackState state = GetFeedbackState();
     // Prevent sending streams to send SR before any media has been sent.
     if (!rtcp_sender_.Sending() || state.packets_sent > 0)
       rtcp_sender_.SendRTCP(state, kRtcpReport);
   }
 
   if (UpdateRTCPReceiveInformationTimers()) {
     // A receiver has timed out
     rtcp_receiver_.UpdateTMMBR();
   }
+  return 0;
 }
 
 void ModuleRtpRtcpImpl::SetRtxSendStatus(int mode) {
   rtp_sender_.SetRtxStatus(mode);
 }
 
 int ModuleRtpRtcpImpl::RtxSendStatus() const {
   return rtp_sender_.RtxStatus();
 }
 
@@ skipping 762 matching lines @@
 void ModuleRtpRtcpImpl::RegisterSendChannelRtpStatisticsCallback(
     StreamDataCountersCallback* callback) {
   rtp_sender_.RegisterRtpStatisticsCallback(callback);
 }
 
 StreamDataCountersCallback*
     ModuleRtpRtcpImpl::GetSendChannelRtpStatisticsCallback() const {
   return rtp_sender_.GetRtpStatisticsCallback();
 }
 }  // namespace webrtc