Revert of Remove ignored return code from modules.

webrtc/modules/video_capture/video_capture_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 75 matching lines @@
 // returns the number of milliseconds until the module want a worker thread to call Process
 int64_t VideoCaptureImpl::TimeUntilNextProcess()
 {
     CriticalSectionScoped cs(&_callBackCs);
     const int64_t kProcessIntervalMs = 300;
     return kProcessIntervalMs -
         (TickTime::Now() - _lastProcessTime).Milliseconds();
 }
 
 // Process any pending tasks such as timeouts
-void VideoCaptureImpl::Process()
+int32_t VideoCaptureImpl::Process()
 {
     CriticalSectionScoped cs(&_callBackCs);
 
     const TickTime now = TickTime::Now();
     _lastProcessTime = TickTime::Now();
 
     // Handle No picture alarm
 
     if (_lastProcessFrameCount.Ticks() == _incomingFrameTimes[0].Ticks() &&
         _captureAlarm != Raised)
@@ skipping 22 matching lines @@
         if (_frameRateCallBack && _captureCallBack)
         {
             const uint32_t frameRate = CalculateFrameRate(now);
             _captureCallBack->OnCaptureFrameRate(_id, frameRate);
         }
         _lastFrameRateCallbackTime = now; // Can be set by EnableFrameRateCallback
 
     }
 
     _lastProcessFrameCount = _incomingFrameTimes[0];
+
+    return 0;
 }
 
 VideoCaptureImpl::VideoCaptureImpl(const int32_t id)
     : _id(id),
       _deviceUniqueId(NULL),
       _apiCs(*CriticalSectionWrapper::CreateCriticalSection()),
       _captureDelay(0),
       _requestedCapability(),
       _callBackCs(*CriticalSectionWrapper::CreateCriticalSection()),
       _lastProcessTime(TickTime::Now()),
@@ skipping 239 matching lines @@
         if (diff > 0)
         {
             return uint32_t((nrOfFrames * 1000.0f / diff) + 0.5f);
         }
     }
 
     return nrOfFrames;
 }
 }  // namespace videocapturemodule
 }  // namespace webrtc