[C++11 Allowed Features] Declares a type-safe null pointer converting from NULL to nullptr

content/browser/accessibility/browser_accessibility.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_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_H_
 #define CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_H_
 
 #include <map>
 #include <utility>
 #include <vector>
@@ skipping 66 matching lines @@
   // layer. Each platform subclass should implement this itself.
   // The definition of a leaf may vary depending on the platform,
   // but a leaf node should never have children that are focusable or
   // that might send notifications.
   virtual bool PlatformIsLeaf() const;
 
   // Returns the number of children of this object, or 0 if PlatformIsLeaf()
   // returns true.
   uint32 PlatformChildCount() const;
 
-  // Return a pointer to the child at the given index, or NULL for an
-  // invalid index. Returns NULL if PlatformIsLeaf() returns true.
+  // Return a pointer to the child at the given index, or nullptr for an
+  // invalid index. Returns nullptr if PlatformIsLeaf() returns true.
   BrowserAccessibility* PlatformGetChild(uint32 child_index) const;
 
-  // Return the previous sibling of this object, or NULL if it's the first
+  // Return the previous sibling of this object, or nullptr if it's the first
   // child of its parent.
   BrowserAccessibility* GetPreviousSibling();
 
-  // Return the next sibling of this object, or NULL if it's the last child
+  // Return the next sibling of this object, or nullptr if it's the last child
   // of its parent.
   BrowserAccessibility* GetNextSibling();
 
   // Returns the bounds of this object in coordinates relative to the
   // top-left corner of the overall web area.
   gfx::Rect GetLocalBoundsRect() const;
 
   // Returns the bounds of this object in screen coordinates.
   gfx::Rect GetGlobalBoundsRect() const;
 
@@ skipping 25 matching lines @@
   virtual void NativeAddReference() { }
 
   // Subclasses should override this to support platform reference counting.
   virtual void NativeReleaseReference();
 
   //
   // Accessors
   //
 
   BrowserAccessibilityManager* manager() const { return manager_; }
-  bool instance_active() const { return node_ != NULL; }
+  bool instance_active() const { return node_ != nullptr; }
   ui::AXNode* node() const { return node_; }
   const std::string& name() const { return name_; }
   const std::string& value() const { return value_; }
   void set_name(const std::string& name) { name_ = name; }
   void set_value(const std::string& value) { value_ = value; }
 
   // These access the internal accessibility tree, which doesn't necessarily
   // reflect the accessibility tree that should be exposed on each platform.
   // Use PlatformChildCount and PlatformGetChild to implement platform
   // accessibility APIs.
@@ skipping 111 matching lines @@
 
   std::string name_;
   std::string value_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserAccessibility);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_H_