C++11 declares a type safe null pointer

content/common/cursors/webcursor.h

 // 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.
 
 #ifndef CONTENT_COMMON_CURSORS_WEBCURSOR_H_
 #define CONTENT_COMMON_CURSORS_WEBCURSOR_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 29 matching lines @@
 // specific methods are provided to translate the cross-platform cursor into a
 // platform specific cursor.  It is also possible to serialize / de-serialize a
 // WebCursor.
 class CONTENT_EXPORT WebCursor {
  public:
   struct CursorInfo {
     explicit CursorInfo(blink::WebCursorInfo::Type cursor_type)
         : type(cursor_type),
           image_scale_factor(1) {
 #if defined(OS_WIN)
-      external_handle = NULL;
+      external_handle = nullptr;
 #endif
     }
 
     CursorInfo()
         : type(blink::WebCursorInfo::TypePointer),
           image_scale_factor(1) {
 #if defined(OS_WIN)
-      external_handle = NULL;
+      external_handle = nullptr;
 #endif
     }
 
     blink::WebCursorInfo::Type type;
     gfx::Point hotspot;
     float image_scale_factor;
     SkBitmap custom_image;
 #if defined(OS_WIN)
     HCURSOR external_handle;
 #endif
@@ skipping 109 matching lines @@
 #endif
 
 #if defined(USE_OZONE)
   gfx::Display::Rotation rotation_;
 #endif
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_CURSORS_WEBCURSOR_H_