Replace NULL with nullptr in all C++ files.

webrtc/examples/peerconnection/client/main_wnd.cc

Index: webrtc/examples/peerconnection/client/main_wnd.cc
diff --git a/webrtc/examples/peerconnection/client/main_wnd.cc b/webrtc/examples/peerconnection/client/main_wnd.cc
index a869f5b0311f7a86d477883605ee95d618f959cd..da3af2ce6d8f42747735e4a8773098e28a002262 100644
--- a/webrtc/examples/peerconnection/client/main_wnd.cc
+++ b/webrtc/examples/peerconnection/client/main_wnd.cc
@@ -67,12 +67,24 @@ void AddListBoxItem(HWND listbox, const std::string& str, LPARAM item_data) {
 
 }  // namespace
 
-MainWnd::MainWnd(const char* server, int port, bool auto_connect,
+MainWnd::MainWnd(const char* server,
+                 int port,
+                 bool auto_connect,
                  bool auto_call)
-  : ui_(CONNECT_TO_SERVER), wnd_(NULL), edit1_(NULL), edit2_(NULL),
-    label1_(NULL), label2_(NULL), button_(NULL), listbox_(NULL),
-    destroyed_(false), callback_(NULL), nested_msg_(NULL),
-    server_(server), auto_connect_(auto_connect), auto_call_(auto_call) {
+    : ui_(CONNECT_TO_SERVER),
+      wnd_(nullptr),
+      edit1_(nullptr),
+      edit2_(nullptr),
+      label1_(nullptr),
+      label2_(nullptr),
+      button_(nullptr),
+      listbox_(nullptr),
+      destroyed_(false),
+      callback_(nullptr),
+      nested_msg_(nullptr),
+      server_(server),
+      auto_connect_(auto_connect),
+      auto_call_(auto_call) {
   char buffer[10] = {0};
   sprintfn(buffer, sizeof(buffer), "%i", port);
   port_ = buffer;
@@ -83,15 +95,16 @@ MainWnd::~MainWnd() {
 }
 
 bool MainWnd::Create() {
-  RTC_DCHECK(wnd_ == NULL);
+  RTC_DCHECK(wnd_ == nullptr);
   if (!RegisterWindowClass())
     return false;
 
   ui_thread_id_ = ::GetCurrentThreadId();
   wnd_ = ::CreateWindowExW(WS_EX_OVERLAPPEDWINDOW, kClassName, L"WebRTC",
-      WS_OVERLAPPEDWINDOW | WS_VISIBLE | WS_CLIPCHILDREN,
-      CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
-      NULL, NULL, GetModuleHandle(NULL), this);
+                           WS_OVERLAPPEDWINDOW | WS_VISIBLE | WS_CLIPCHILDREN,
+                           CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
+                           CW_USEDEFAULT, nullptr, nullptr,
+                           GetModuleHandle(nullptr), this);
 
   ::SendMessage(wnd_, WM_SETFONT, reinterpret_cast<WPARAM>(GetDefaultFont()),
                 TRUE);
@@ -99,7 +112,7 @@ bool MainWnd::Create() {
   CreateChildWindows();
   SwitchToConnectUI();
 
-  return wnd_ != NULL;
+  return wnd_ != nullptr;
 }
 
 bool MainWnd::Destroy() {
@@ -137,7 +150,7 @@ bool MainWnd::PreTranslateMessage(MSG* msg) {
         }
       }
     }
-  } else if (msg->hwnd == NULL && msg->message == UI_THREAD_CALLBACK) {
+  } else if (msg->hwnd == nullptr && msg->message == UI_THREAD_CALLBACK) {
     callback_->UIThreadCallback(static_cast<int>(msg->wParam),
                                 reinterpret_cast<void*>(msg->lParam));
     ret = true;
@@ -238,7 +251,7 @@ void MainWnd::OnPaint() {
     int width = bmi.bmiHeader.biWidth;
 
     const uint8_t* image = remote_renderer->image();
-    if (image != NULL) {
+    if (image != nullptr) {
       HDC dc_mem = ::CreateCompatibleDC(ps.hdc);
       ::SetStretchBltMode(dc_mem, HALFTONE);
 
@@ -246,8 +259,8 @@ void MainWnd::OnPaint() {
       HDC all_dc[] = { ps.hdc, dc_mem };
       for (int i = 0; i < arraysize(all_dc); ++i) {
         SetMapMode(all_dc[i], MM_ISOTROPIC);
-        SetWindowExtEx(all_dc[i], width, height, NULL);
-        SetViewportExtEx(all_dc[i], rc.right, rc.bottom, NULL);
+        SetWindowExtEx(all_dc[i], width, height, nullptr);
+        SetViewportExtEx(all_dc[i], rc.right, rc.bottom, nullptr);
       }
 
       HBITMAP bmp_mem = ::CreateCompatibleBitmap(ps.hdc, rc.right, rc.bottom);
@@ -413,9 +426,9 @@ LRESULT CALLBACK MainWnd::WndProc(HWND hwnd, UINT msg, WPARAM wp, LPARAM lp) {
       result = ::DefWindowProc(hwnd, msg, wp, lp);
     }
 
-    if (me->destroyed_ && prev_nested_msg == NULL) {
+    if (me->destroyed_ && prev_nested_msg == nullptr) {
       me->OnDestroyed();
-      me->wnd_ = NULL;
+      me->wnd_ = nullptr;
       me->destroyed_ = false;
     }
 
@@ -434,9 +447,9 @@ bool MainWnd::RegisterWindowClass() {
 
   WNDCLASSEX wcex = { sizeof(WNDCLASSEX) };
   wcex.style = CS_DBLCLKS;
-  wcex.hInstance = GetModuleHandle(NULL);
+  wcex.hInstance = GetModuleHandle(nullptr);
   wcex.hbrBackground = reinterpret_cast<HBRUSH>(COLOR_WINDOW + 1);
-  wcex.hCursor = ::LoadCursor(NULL, IDC_ARROW);
+  wcex.hCursor = ::LoadCursor(nullptr, IDC_ARROW);
   wcex.lpfnWndProc = &WndProc;
   wcex.lpszClassName = kClassName;
   wnd_class_ = ::RegisterClassEx(&wcex);
@@ -452,10 +465,9 @@ void MainWnd::CreateChildWindow(HWND* wnd, MainWnd::ChildWindowID id,
 
   // Child windows are invisible at first, and shown after being resized.
   DWORD style = WS_CHILD | control_style;
-  *wnd = ::CreateWindowEx(ex_style, class_name, L"", style,
-                          100, 100, 100, 100, wnd_,
-                          reinterpret_cast<HMENU>(id),
-                          GetModuleHandle(NULL), NULL);
+  *wnd = ::CreateWindowEx(ex_style, class_name, L"", style, 100, 100, 100, 100,
+                          wnd_, reinterpret_cast<HMENU>(id),
+                          GetModuleHandle(nullptr), nullptr);
   RTC_DCHECK(::IsWindow(*wnd) != FALSE);
   ::SendMessage(*wnd, WM_SETFONT, reinterpret_cast<WPARAM>(GetDefaultFont()),
                 TRUE);
@@ -532,7 +544,7 @@ void MainWnd::LayoutPeerListUI(bool show) {
     ::ShowWindow(listbox_, SW_SHOWNA);
   } else {
     ::ShowWindow(listbox_, SW_HIDE);
-    InvalidateRect(wnd_, NULL, TRUE);
+    InvalidateRect(wnd_, nullptr, TRUE);
   }
 }
 
@@ -614,7 +626,7 @@ void MainWnd::VideoRenderer::OnFrame(
 
     SetSize(buffer->width(), buffer->height());
 
-    RTC_DCHECK(image_.get() != NULL);
+    RTC_DCHECK(image_.get() != nullptr);
     libyuv::I420ToARGB(buffer->DataY(), buffer->StrideY(),
                        buffer->DataU(), buffer->StrideU(),
                        buffer->DataV(), buffer->StrideV(),
@@ -623,5 +635,5 @@ void MainWnd::VideoRenderer::OnFrame(
                            bmi_.bmiHeader.biBitCount / 8,
                        buffer->width(), buffer->height());
   }
-  InvalidateRect(wnd_, NULL, TRUE);
+  InvalidateRect(wnd_, nullptr, TRUE);
 }