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

content/browser/accessibility/browser_accessibility_mac_unittest.mm

 // 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.
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/browser/accessibility/browser_accessibility_cocoa.h"
@@ skipping 34 matching lines @@
     child2.id = 1002;
     child2.location.set_x(250);
     child2.location.set_width(250);
     child2.location.set_height(100);
     child2.role = ui::AX_ROLE_HEADING;
 
     manager_.reset(
         new BrowserAccessibilityManagerMac(
             nil,
             MakeAXTreeUpdate(root, child1, child2),
-            NULL));
+            nullptr));
     accessibility_.reset([manager_->GetRoot()->ToBrowserAccessibilityCocoa()
         retain]);
   }
 
   base::scoped_nsobject<BrowserAccessibilityCocoa> accessibility_;
   scoped_ptr<BrowserAccessibilityManager> manager_;
 };
 
 // Standard hit test.
 TEST_F(BrowserAccessibilityTest, HitTestTest) {
@@ skipping 50 matching lines @@
 
   // Now any attributes we query should return nil.
   EXPECT_EQ(nil, [retainedFirstChild
       accessibilityAttributeValue:NSAccessibilityTitleAttribute]);
 
   // Don't leak memory in the test.
   [retainedFirstChild release];
 }
 
 }  // namespace content