Revert of Remove ignored return code from modules.

webrtc/modules/video_coding/test/vcm_payload_sink_factory.cc

 /*
  *  Copyright (c) 2013 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 56 matching lines @@
     if (should_decode) {
       if (vcm_->Decode() < 0) {
         return -1;
       }
     }
     return Process() ? 0 : -1;
   }
 
   bool Process() {
     if (vcm_->TimeUntilNextProcess() <= 0) {
-      vcm_->Process();
+      if (vcm_->Process() < 0) {
+        return false;
+      }
     }
     return true;
   }
 
   bool Decode() {
     vcm_->Decode(10000);
     return true;
   }
 
  private:
@@ skipping 105 matching lines @@
 void VcmPayloadSinkFactory::Remove(VcmPayloadSink* sink) {
   assert(sink);
   CriticalSectionScoped cs(crit_sect_.get());
   Sinks::iterator it = std::find(sinks_.begin(), sinks_.end(), sink);
   assert(it != sinks_.end());
   sinks_.erase(it);
 }
 
 }  // namespace rtpplayer
 }  // namespace webrtc