fix for 27454 - Fade out close button state on mouse exit

chrome/browser/ui/cocoa/hover_close_button.h

 // Copyright (c) 2011 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 "chrome/browser/ui/cocoa/hover_button.h"
 
 #include "base/memory/scoped_nsobject.h"
-#include "chrome/browser/ui/cocoa/hover_button.h"
+
+@class CALayer;
 
 // The standard close button for our Mac UI which is the "x" that changes to a
 // dark circle with the "x" when you hover over it. At this time it is used by
-// the popup blocker, download bar, info bar and tabs.
+// the download bar, info bar and tabs.
 @interface HoverCloseButton : HoverButton {
  @private
-  // Bezier path for drawing the 'x' within the button.
-  scoped_nsobject<NSBezierPath> xPath_;
-
-  // Bezier path for drawing the hover state circle behind the 'x'.
-  scoped_nsobject<NSBezierPath> circlePath_;
-
-  // Translation of the 'x' button to the middle vertically.
-  scoped_nsobject<NSAffineTransform> transform_;
-
-  // The size of the control when the last drawRect: was called, to recenter
-  // the paths above if it changed.
-  NSSize oldSize_;
+  scoped_nsobject<CALayer> hoverNoneLayer_;
+  scoped_nsobject<CALayer> hoverMouseOverLayer_;
+  scoped_nsobject<CALayer> hoverMouseDownLayer_;
 }
 
-// Sets up the button's tracking areas and accessibility info when instantiated
-// via initWithFrame or awakeFromNib.
-- (void)commonInit;
-
 @end