Replace NULL with nullptr in all C++ files.

webrtc/pc/videocapturertracksource.cc

 /*
  *  Copyright 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 84 matching lines @@
 }
 
 // Returns true if |constraint| is fulfilled. |format_out| can differ from
 // |format_in| if the format is changed by the constraint. Ie - the frame rate
 // can be changed by setting maxFrameRate.
 bool NewFormatWithConstraints(
     const MediaConstraintsInterface::Constraint& constraint,
     const cricket::VideoFormat& format_in,
     bool mandatory,
     cricket::VideoFormat* format_out) {
-  RTC_DCHECK(format_out != NULL);
+  RTC_DCHECK(format_out != nullptr);
   *format_out = format_in;
 
   if (constraint.key == MediaConstraintsInterface::kMinWidth) {
     int value = rtc::FromString<int>(constraint.value);
     return (value <= format_in.width);
   } else if (constraint.key == MediaConstraintsInterface::kMaxWidth) {
     int value = rtc::FromString<int>(constraint.value);
     return (value >= format_in.width);
   } else if (constraint.key == MediaConstraintsInterface::kMinHeight) {
     int value = rtc::FromString<int>(constraint.value);
@@ skipping 138 matching lines @@
 
 }  // anonymous namespace
 
 namespace webrtc {
 
 rtc::scoped_refptr<VideoTrackSourceInterface> VideoCapturerTrackSource::Create(
     rtc::Thread* worker_thread,
     cricket::VideoCapturer* capturer,
     const webrtc::MediaConstraintsInterface* constraints,
     bool remote) {
-  RTC_DCHECK(worker_thread != NULL);
-  RTC_DCHECK(capturer != NULL);
+  RTC_DCHECK(worker_thread != nullptr);
+  RTC_DCHECK(capturer != nullptr);
   rtc::scoped_refptr<VideoCapturerTrackSource> source(
       new rtc::RefCountedObject<VideoCapturerTrackSource>(worker_thread,
                                                           capturer, remote));
   source->Initialize(constraints);
   return source;
 }
 
 rtc::scoped_refptr<VideoTrackSourceInterface> VideoCapturerTrackSource::Create(
     rtc::Thread* worker_thread,
     cricket::VideoCapturer* capturer,
     bool remote) {
-  RTC_DCHECK(worker_thread != NULL);
-  RTC_DCHECK(capturer != NULL);
+  RTC_DCHECK(worker_thread != nullptr);
+  RTC_DCHECK(capturer != nullptr);
   rtc::scoped_refptr<VideoCapturerTrackSource> source(
       new rtc::RefCountedObject<VideoCapturerTrackSource>(worker_thread,
                                                           capturer, remote));
   source->Initialize(nullptr);
   return source;
 }
 
 VideoCapturerTrackSource::VideoCapturerTrackSource(
     rtc::Thread* worker_thread,
     cricket::VideoCapturer* capturer,
@@ skipping 99 matching lines @@
                   capture_state));
     return;
   }
 
   if (capturer == video_capturer_.get()) {
     SetState(GetReadyState(capture_state));
   }
 }
 
 }  // namespace webrtc