NULL => nullptr

atom/browser/native_window_mac.mm

@@ -1262,7 +1262,7 @@ void NativeWindowMac::SetProgressBar(double progress, const NativeWindow::Progre
   NSDockTile* dock_tile = [NSApp dockTile];
 
   // For the first time API invoked, we need to create a ContentView in DockTile.
-  if (dock_tile.contentView == NULL) {
+  if (dock_tile.contentView == nullptr) {
     NSImageView* image_view = [[NSImageView alloc] init];
     [image_view setImage:[NSApp applicationIconImage]];
     [dock_tile setContentView:image_view];

atom/browser/ui/cocoa/atom_menu_controller.mm

@@ -70,7 +70,7 @@ Role kRolesMap[] = {
   // while its context menu is still open.
   [self cancel];
 
-  model_ = NULL;
+  model_ = nullptr;
   [super dealloc];
 }
 

atom/browser/ui/file_dialog_mac.mm

@@ -154,7 +154,7 @@ void ShowOpenDialog(const DialogSettings& settings,
 
   NSWindow* window = settings.parent_window ?
       settings.parent_window->GetNativeWindow() :
-      NULL;
+      nullptr;
   [dialog beginSheetModalForWindow:window
                  completionHandler:^(NSInteger chosen) {
     if (chosen == NSFileHandlingPanelCancelButton) {
@@ -193,7 +193,7 @@ void ShowSaveDialog(const DialogSettings& settings,
 
   NSWindow* window = settings.parent_window ?
     settings.parent_window->GetNativeWindow() :
-    NULL;
+    nullptr;
   [dialog beginSheetModalForWindow:window
                  completionHandler:^(NSInteger chosen) {
     if (chosen == NSFileHandlingPanelCancelButton) {

atom/common/platform_util_mac.mm

@@ -71,10 +71,10 @@ std::string MessageForOSStatus(OSStatus status, const char* default_message) {
 // thread safe, including LSGetApplicationForURL (> 10.2) and
 // NSWorkspace#openURLs.
 std::string OpenURL(NSURL* ns_url, bool activate) {
-  CFURLRef openingApp = NULL;
+  CFURLRef openingApp = nullptr;
   OSStatus status = LSGetApplicationForURL((CFURLRef)ns_url,
                                            kLSRolesAll,
-                                           NULL,
+                                           nullptr,
                                            &openingApp);
   if (status != noErr)
     return MessageForOSStatus(status, "Failed to open");
@@ -156,7 +156,7 @@ bool OpenItem(const base::FilePath& full_path) {
 
   // Create the list of files (only ever one) to open.
   base::mac::ScopedAEDesc<AEDescList> fileList;
-  status = AECreateList(NULL,  // factoringPtr
+  status = AECreateList(nullptr,  // factoringPtr
                         0,  // factoredSize
                         false,  // isRecord
                         fileList.OutPointer());  // resultList
@@ -202,8 +202,8 @@ bool OpenItem(const base::FilePath& full_path) {
                   kAENoReply + kAEAlwaysInteract,  // sendMode
                   kAENormalPriority,  // sendPriority
                   kAEDefaultTimeout,  // timeOutInTicks
-                  NULL, // idleProc
-                  NULL);  // filterProc
+                  nullptr, // idleProc
+                  nullptr);  // filterProc
   if (status != noErr) {
     OSSTATUS_LOG(WARNING, status)
         << "Could not send AE to Finder in OpenItem()";