Revert of Remove ignored return code from modules.

webrtc/video/overuse_frame_detector.h

 /*
  *  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 72 matching lines @@
   ~OveruseFrameDetector();
 
   // Called for each captured frame.
   void FrameCaptured(const VideoFrame& frame);
 
   // Called for each sent frame.
   void FrameSent(uint32_t timestamp);
 
   // Implements Module.
   int64_t TimeUntilNextProcess() override;
-  void Process() override;
+  int32_t Process() override;
 
  private:
   class SendProcessingUsage;
   struct FrameTiming {
     FrameTiming(int64_t capture_ntp_ms, uint32_t timestamp, int64_t now)
         : capture_ntp_ms(capture_ntp_ms),
           timestamp(timestamp),
           capture_ms(now),
           last_send_ms(-1) {}
     int64_t capture_ntp_ms;
@@ skipping 54 matching lines @@
   std::list<FrameTiming> frame_timing_ GUARDED_BY(crit_);
 
   rtc::ThreadChecker processing_thread_;
 
   RTC_DISALLOW_COPY_AND_ASSIGN(OveruseFrameDetector);
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_VIDEO_OVERUSE_FRAME_DETECTOR_H_