Mac/clang: Possibly contentious changes.

chrome/browser/cocoa/background_gradient_view.h

 // Copyright (c) 2009 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 CHROME_BROWSER_COCOA_BACKGROUND_GRADIENT_VIEW_H_
 #define CHROME_BROWSER_COCOA_BACKGROUND_GRADIENT_VIEW_H_
 
 #import <Cocoa/Cocoa.h>
 
 // A custom view that draws a 'standard' background gradient.
 // Base class for other Chromium views.
 @interface BackgroundGradientView : NSView {
  @private
   BOOL showsDivider_;
 }
 
 // The color used for the bottom stroke. Public so subclasses can use.
 - (NSColor *)strokeColor;
 
 // Draws the background for this view. Make sure that your patternphase
 // is set up correctly in your graphics context before calling.
 - (void)drawBackground;
 
 // Controls whether the bar draws a dividing line at the bottom.
-@property(assign) BOOL showsDivider;
+@property(nonatomic, assign) BOOL showsDivider;
 @end
 
 #endif  // CHROME_BROWSER_COCOA_BACKGROUND_GRADIENT_VIEW_H_