replace NULL->nullptr in src/remoting.

remoting/host/continue_window_linux.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <gtk/gtk.h>
 
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "base/strings/utf_string_conversions.h"
 #include "remoting/base/string_resources.h"
@@ skipping 17 matching lines @@
   void CreateWindow();
 
   CHROMEG_CALLBACK_1(ContinueWindowGtk, void, OnResponse, GtkDialog*, int);
 
   GtkWidget* continue_window_;
 
   DISALLOW_COPY_AND_ASSIGN(ContinueWindowGtk);
 };
 
 ContinueWindowGtk::ContinueWindowGtk()
-    : continue_window_(NULL) {
+    : continue_window_(nullptr) {
 }
 
 ContinueWindowGtk::~ContinueWindowGtk() {
   if (continue_window_) {
     gtk_widget_destroy(continue_window_);
-    continue_window_ = NULL;
+    continue_window_ = nullptr;
   }
 }
 
 void ContinueWindowGtk::ShowUi() {
   DCHECK(CalledOnValidThread());
   DCHECK(!continue_window_);
 
   CreateWindow();
   gtk_window_set_urgency_hint(GTK_WINDOW(continue_window_), TRUE);
   gtk_window_present(GTK_WINDOW(continue_window_));
 }
 
 void ContinueWindowGtk::HideUi() {
   DCHECK(CalledOnValidThread());
 
   if (continue_window_) {
     gtk_widget_destroy(continue_window_);
-    continue_window_ = NULL;
+    continue_window_ = nullptr;
   }
 }
 
 void ContinueWindowGtk::CreateWindow() {
   DCHECK(CalledOnValidThread());
   DCHECK(!continue_window_);
 
   continue_window_ = gtk_dialog_new_with_buttons(
       l10n_util::GetStringUTF8(IDS_PRODUCT_NAME).c_str(),
-      NULL,
+      nullptr,
       static_cast<GtkDialogFlags>(GTK_DIALOG_MODAL | GTK_DIALOG_NO_SEPARATOR),
       l10n_util::GetStringUTF8(IDS_STOP_SHARING_BUTTON).c_str(),
       GTK_RESPONSE_CANCEL,
       l10n_util::GetStringUTF8(IDS_CONTINUE_BUTTON).c_str(),
       GTK_RESPONSE_OK,
-      NULL);
+      nullptr);
 
   gtk_dialog_set_default_response(GTK_DIALOG(continue_window_),
                                   GTK_RESPONSE_OK);
   gtk_window_set_resizable(GTK_WINDOW(continue_window_), FALSE);
 
   // Set always-on-top, otherwise this window tends to be obscured by the
   // DisconnectWindow.
   gtk_window_set_keep_above(GTK_WINDOW(continue_window_), TRUE);
 
   g_signal_connect(continue_window_, "response",
@@ skipping 23 matching lines @@
 
   HideUi();
 }
 
 // static
 scoped_ptr<HostWindow> HostWindow::CreateContinueWindow() {
   return make_scoped_ptr(new ContinueWindowGtk());
 }
 
 }  // namespace remoting