Replace NULL with nullptr in all C++ files.

webrtc/test/frame_generator_capturer.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 11 matching lines @@
 namespace test {
 
 FrameGeneratorCapturer* FrameGeneratorCapturer::Create(size_t width,
                                                        size_t height,
                                                        int target_fps,
                                                        Clock* clock) {
   FrameGeneratorCapturer* capturer = new FrameGeneratorCapturer(
       clock, FrameGenerator::CreateChromaGenerator(width, height), target_fps);
   if (!capturer->Init()) {
     delete capturer;
-    return NULL;
+    return nullptr;
   }
 
   return capturer;
 }
 
 FrameGeneratorCapturer* FrameGeneratorCapturer::CreateFromYuvFile(
     const std::string& file_name,
     size_t width,
     size_t height,
     int target_fps,
     Clock* clock) {
   FrameGeneratorCapturer* capturer = new FrameGeneratorCapturer(
       clock, FrameGenerator::CreateFromYuvFile(
                  std::vector<std::string>(1, file_name), width, height, 1),
       target_fps);
   if (!capturer->Init()) {
     delete capturer;
-    return NULL;
+    return nullptr;
   }
 
   return capturer;
 }
 
 FrameGeneratorCapturer::FrameGeneratorCapturer(Clock* clock,
                                                FrameGenerator* frame_generator,
                                                int target_fps)
     : clock_(clock),
       sending_(false),
@@ skipping 15 matching lines @@
 }
 
 void FrameGeneratorCapturer::SetFakeRotation(VideoRotation rotation) {
   rtc::CritScope cs(&lock_);
   fake_rotation_ = rotation;
 }
 
 bool FrameGeneratorCapturer::Init() {
   // This check is added because frame_generator_ might be file based and should
   // not crash because a file moved.
-  if (frame_generator_.get() == NULL)
+  if (frame_generator_.get() == nullptr)
     return false;
 
   if (!tick_->StartTimer(true, 1000 / target_fps_))
     return false;
   thread_.Start();
   thread_.SetPriority(rtc::kHighPriority);
   return true;
 }
 
 bool FrameGeneratorCapturer::Run(void* obj) {
@@ skipping 54 matching lines @@
   rtc::CritScope cs(&lock_);
   RTC_CHECK(sink_ == sink);
   sink_ = nullptr;
 }
 
 void FrameGeneratorCapturer::ForceFrame() {
   tick_->Set();
 }
 }  // test
 }  // webrtc