Replace NULL with nullptr or null in webrtc/base/.

webrtc/base/win32window.cc

 /*
  *  Copyright 2004 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.
  */
 
 #include "webrtc/base/checks.h"
 #include "webrtc/base/logging.h"
 #include "webrtc/base/win32window.h"
 
 namespace rtc {
 
 ///////////////////////////////////////////////////////////////////////////////
 // Win32Window
 ///////////////////////////////////////////////////////////////////////////////
 
 static const wchar_t kWindowBaseClassName[] = L"WindowBaseClass";
-HINSTANCE Win32Window::instance_ = NULL;
+HINSTANCE Win32Window::instance_ = nullptr;
 ATOM Win32Window::window_class_ = 0;
 
-Win32Window::Win32Window() : wnd_(NULL) {
-}
+Win32Window::Win32Window() : wnd_(nullptr) {}
 
 Win32Window::~Win32Window() {
-  RTC_DCHECK(NULL == wnd_);
+  RTC_DCHECK(nullptr == wnd_);
 }
 
 bool Win32Window::Create(HWND parent, const wchar_t* title, DWORD style,
                          DWORD exstyle, int x, int y, int cx, int cy) {
   if (wnd_) {
     // Window already exists.
     return false;
   }
 
   if (!window_class_) {
@@ skipping 11 matching lines @@
     wcex.cbSize = sizeof(wcex);
     wcex.hInstance = instance_;
     wcex.lpfnWndProc = &Win32Window::WndProc;
     wcex.lpszClassName = kWindowBaseClassName;
     window_class_ = ::RegisterClassEx(&wcex);
     if (!window_class_) {
       LOG_GLE(LS_ERROR) << "RegisterClassEx failed";
       return false;
     }
   }
-  wnd_ = ::CreateWindowEx(exstyle, kWindowBaseClassName, title, style,
-                          x, y, cx, cy, parent, NULL, instance_, this);
-  return (NULL != wnd_);
+  wnd_ = ::CreateWindowEx(exstyle, kWindowBaseClassName, title, style, x, y, cx,
+                          cy, parent, nullptr, instance_, this);
+  return (nullptr != wnd_);
 }
 
 void Win32Window::Destroy() {
   const bool success = ::DestroyWindow(wnd_);
   RTC_DCHECK(success);
 }
 
 void Win32Window::Shutdown() {
   if (window_class_) {
     ::UnregisterClass(MAKEINTATOM(window_class_), instance_);
@@ skipping 28 matching lines @@
     LRESULT result;
     bool handled = that->OnMessage(uMsg, wParam, lParam, result);
     if (WM_DESTROY == uMsg) {
       for (HWND child = ::GetWindow(hwnd, GW_CHILD); child;
            child = ::GetWindow(child, GW_HWNDNEXT)) {
         LOG(LS_INFO) << "Child window: " << static_cast<void*>(child);
       }
     }
     if (WM_NCDESTROY == uMsg) {
       ::SetWindowLongPtr(hwnd, GWLP_USERDATA, NULL);
-      that->wnd_ = NULL;
+      that->wnd_ = nullptr;
       that->OnNcDestroy();
     }
     if (handled) {
       return result;
     }
   }
   return ::DefWindowProc(hwnd, uMsg, wParam, lParam);
 }
 
 }  // namespace rtc