Replace NULL with nullptr in all C++ files.

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 62 matching lines @@
       *degrees = 180;
       return 0;
     case kVideoRotation_270:
       *degrees = 270;
       return 0;
   }
   return -1;
 }
 
 VideoCaptureImpl::VideoCaptureImpl()
-    : _deviceUniqueId(NULL),
+    : _deviceUniqueId(nullptr),
       _apiCs(*CriticalSectionWrapper::CreateCriticalSection()),
       _captureDelay(0),
       _requestedCapability(),
       _lastProcessTimeNanos(rtc::TimeNanos()),
       _lastFrameRateCallbackTimeNanos(rtc::TimeNanos()),
-      _dataCallBack(NULL),
+      _dataCallBack(nullptr),
       _lastProcessFrameTimeNanos(rtc::TimeNanos()),
       _rotateFrame(kVideoRotation_0),
       apply_rotation_(false) {
-    _requestedCapability.width = kDefaultWidth;
-    _requestedCapability.height = kDefaultHeight;
-    _requestedCapability.maxFPS = 30;
-    _requestedCapability.rawType = kVideoI420;
-    _requestedCapability.codecType = kVideoCodecUnknown;
-    memset(_incomingFrameTimesNanos, 0, sizeof(_incomingFrameTimesNanos));
+  _requestedCapability.width = kDefaultWidth;
+  _requestedCapability.height = kDefaultHeight;
+  _requestedCapability.maxFPS = 30;
+  _requestedCapability.rawType = kVideoI420;
+  _requestedCapability.codecType = kVideoCodecUnknown;
+  memset(_incomingFrameTimesNanos, 0, sizeof(_incomingFrameTimesNanos));
 }
 
 VideoCaptureImpl::~VideoCaptureImpl()
 {
     DeRegisterCaptureDataCallback();
     delete &_apiCs;
 
     if (_deviceUniqueId)
         delete[] _deviceUniqueId;
 }
 
 void VideoCaptureImpl::RegisterCaptureDataCallback(
     rtc::VideoSinkInterface<VideoFrame>* dataCallBack) {
     CriticalSectionScoped cs(&_apiCs);
     _dataCallBack = dataCallBack;
 }
 
 void VideoCaptureImpl::DeRegisterCaptureDataCallback() {
     CriticalSectionScoped cs(&_apiCs);
-    _dataCallBack = NULL;
+    _dataCallBack = nullptr;
 }
 int32_t VideoCaptureImpl::DeliverCapturedFrame(VideoFrame& captureFrame) {
   UpdateFrameCount();  // frame count used for local frame rate callback.
 
   if (_dataCallBack) {
     _dataCallBack->OnFrame(captureFrame);
   }
 
   return 0;
 }
@@ skipping 132 matching lines @@
         if (diff > 0)
         {
             return uint32_t((nrOfFrames * 1000.0f / diff) + 0.5f);
         }
     }
 
     return nrOfFrames;
 }
 }  // namespace videocapturemodule
 }  // namespace webrtc