Replace NULL with nullptr in all C++ files.

webrtc/modules/desktop_capture/desktop_frame.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 40 matching lines @@
 
   CopyPixelsFrom(src_frame.GetFrameDataAtPos(src_pos),
                  src_frame.stride(), dest_rect);
 }
 
 uint8_t* DesktopFrame::GetFrameDataAtPos(const DesktopVector& pos) const {
   return data() + stride() * pos.y() + DesktopFrame::kBytesPerPixel * pos.x();
 }
 
 BasicDesktopFrame::BasicDesktopFrame(DesktopSize size)
-    : DesktopFrame(size, kBytesPerPixel * size.width(),
+    : DesktopFrame(size,
+                   kBytesPerPixel * size.width(),
                    new uint8_t[kBytesPerPixel * size.width() * size.height()],
-                   NULL) {
-}
+                   nullptr) {}
 
 BasicDesktopFrame::~BasicDesktopFrame() {
   delete[] data_;
 }
 
 DesktopFrame* BasicDesktopFrame::CopyOf(const DesktopFrame& frame) {
   DesktopFrame* result = new BasicDesktopFrame(frame.size());
   for (int y = 0; y < frame.size().height(); ++y) {
     memcpy(result->data() + y * result->stride(),
            frame.data() + y * frame.stride(),
@@ skipping 34 matching lines @@
     : DesktopFrame(size,
                    stride,
                    reinterpret_cast<uint8_t*>(shared_memory->data()),
                    shared_memory) {}
 
 SharedMemoryDesktopFrame::~SharedMemoryDesktopFrame() {
   delete shared_memory_;
 }
 
 }  // namespace webrtc