Add theme support for the yellow star on the Mac....

chrome/browser/cocoa/gradient_button_cell.mm

 // 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.
 
 #include "chrome/browser/cocoa/gradient_button_cell.h"
 #import "third_party/GTM/AppKit/GTMTheme.h"
 #import "base/scoped_nsobject.h"
 
+@interface GradientButtonCell (Private)
+- (void)drawUnderlayImageWithFrame:(NSRect)cellFrame
+                            inView:(NSView*)controlView;
+@end
+
+
 @implementation GradientButtonCell
 
 // For nib instantiations
 - (id)initWithCoder:(NSCoder*)decoder {
   if ((self = [super initWithCoder:decoder])) {
     shouldTheme_ = YES;
   }
   return self;
 }
 
 // For programmatic instantiations
 - (id)initTextCell:(NSString*)string {
   if ((self = [super initTextCell:string])) {
     shouldTheme_ = YES;
   }
   return self;
 }
 
 - (void)setShouldTheme:(BOOL)shouldTheme {
   shouldTheme_ = shouldTheme;
 }
 
+- (NSImage*)underlayImage {
+  return underlayImage_;
+}
+
+- (void)setUnderlayImage:(NSImage*)image {
+  underlayImage_.reset([image retain]);
+
+  [[self controlView] setNeedsDisplay:YES];
+}
+
 - (NSBackgroundStyle)interiorBackgroundStyle {
   return [self isHighlighted] ?
       NSBackgroundStyleLowered : NSBackgroundStyleRaised;
 }
 
 - (void)mouseEntered:(NSEvent *)theEvent {
   isMouseInside_ = YES;
   [[self controlView] setNeedsDisplay:YES];
 }
 
@@ skipping 159 matching lines @@
         (CGContextRef)([[NSGraphicsContext currentContext] graphicsPort]);
 
     if (isTemplate) {
       scoped_nsobject<NSShadow> shadow([[NSShadow alloc] init]);
       [shadow setShadowColor:[NSColor whiteColor]];
       [shadow setShadowOffset:NSMakeSize(0, -1.0)];
       [shadow setShadowBlurRadius:1.0];
       [shadow set];
     }
 
+    [self drawUnderlayImageWithFrame:cellFrame inView:controlView];
+
     CGContextBeginTransparencyLayer(context, 0);
     NSRect imageRect = NSZeroRect;
     imageRect.size = [[self image] size];
     [[self image] setFlipped:[controlView isFlipped]];
     [[self image] drawInRect:[self imageRectForBounds:cellFrame]
                     fromRect:imageRect
                    operation:NSCompositeSourceOver
                     fraction:[self isEnabled] ? 1.0 : 0.5];
     if (isTemplate) {
       NSColor* color = [theme iconColorForStyle:GTMThemeStyleToolBarButton
                                           state:YES];
       [color set];
       NSRectFillUsingOperation(cellFrame,NSCompositeSourceAtop);
     }
 
     CGContextEndTransparencyLayer(context);
     [NSGraphicsContext restoreGraphicsState];
   } else {
+    [self drawUnderlayImageWithFrame:cellFrame inView:controlView];
+
     // NSCell draws these uncentered for some reason, probably because of the
     // of control in the xib
     [super drawInteriorWithFrame:NSOffsetRect(cellFrame, 0, 1)
                           inView:controlView];
   }
 }
 
+- (void)drawUnderlayImageWithFrame:(NSRect)cellFrame
+                            inView:(NSView*)controlView {
+  if (underlayImage_) {
+    NSRect imageRect = NSZeroRect;
+    imageRect.size = [underlayImage_ size];
+    [underlayImage_ setFlipped:[controlView isFlipped]];
+    [underlayImage_ drawInRect:[self imageRectForBounds:cellFrame]
+                      fromRect:imageRect
+                     operation:NSCompositeSourceOver
+                      fraction:[self isEnabled] ? 1.0 : 0.5];
+  }
+}
+
 @end