Revert of Remove ignored return code from modules.

webrtc/modules/video_coding/video_coding_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 76 matching lines @@
   virtual ~VideoCodingModuleImpl() { own_event_factory_.reset(); }
 
   int64_t TimeUntilNextProcess() override {
     int64_t sender_time = sender_.TimeUntilNextProcess();
     int64_t receiver_time = receiver_.TimeUntilNextProcess();
     assert(sender_time >= 0);
     assert(receiver_time >= 0);
     return VCM_MIN(sender_time, receiver_time);
   }
 
-  void Process() override {
-    sender_.Process();
-    receiver_.Process();
+  int32_t Process() override {
+    int32_t sender_return = sender_.Process();
+    int32_t receiver_return = receiver_.Process();
+    if (sender_return != VCM_OK)
+      return sender_return;
+    return receiver_return;
   }
 
   int32_t RegisterSendCodec(const VideoCodec* sendCodec,
                             uint32_t numberOfCores,
                             uint32_t maxPayloadSize) override {
     return sender_.RegisterSendCodec(sendCodec, numberOfCores, maxPayloadSize);
   }
 
   int32_t RegisterExternalEncoder(VideoEncoder* externalEncoder,
                                   uint8_t payloadType,
@@ skipping 191 matching lines @@
 
 VideoCodingModule* VideoCodingModule::Create(Clock* clock,
                                              EventFactory* event_factory) {
   assert(clock);
   assert(event_factory);
   return new VideoCodingModuleImpl(clock, event_factory, false, nullptr,
                                    nullptr);
 }
 
 }  // namespace webrtc