Use a real download item....

chrome/browser/cocoa/gradient_button_cell.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_CHROMIUM_BUTTON_CELL_H_
 #define CHROME_BROWSER_COCOA_CHROMIUM_BUTTON_CELL_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/scoped_nsobject.h"
 
+@class GTMTheme;
+
 // Base class for button cells for toolbar and bookmark bar.
 //
 // This is a button cell that handles drawing/highlighting of buttons.
 // The appearance is determined by setting the cell's tag (not the
 // view's) to one of the constants below (ButtonType).
 
+// Set this as the cell's tag.
 enum {
   kLeftButtonType = -1,
   kLeftButtonWithShadowType = -2,
   kStandardButtonType = 0,
   kRightButtonType = 1,
 };
 typedef NSInteger ButtonType;
 
 @interface GradientButtonCell : NSButtonCell {
  @private
   // Custom drawing means we need to perform our own mouse tracking if
   // the cell is setShowsBorderOnlyWhileMouseInside:YES.
   BOOL isMouseInside_;
   scoped_nsobject<NSTrackingArea> trackingArea_;
   BOOL shouldTheme_;
 }
 // Turn off theming.  Temporary work-around.
 - (void)setShouldTheme:(BOOL)shouldTheme;
+
+- (void)drawBorderAndFillForTheme:(GTMTheme*)theme
+                      controlView:(NSView*)controlView
+                        outerPath:(NSBezierPath*)outerPath
+                        innerPath:(NSBezierPath*)innerPath
+            showHighlightGradient:(BOOL)showHighlightGradient
+              showClickedGradient:(BOOL)showClickedGradient
+                           active:(BOOL)active
+                        cellFrame:(NSRect)cellFrame;
 @end
 
 @interface GradientButtonCell(TestingAPI)
 - (BOOL)isMouseInside;
 @end
 
 #endif  // CHROME_BROWSER_COCOA_CHROMIUM_BUTTON_CELL_H_