[Mac] Do not use |+[NSColor selectedMenuItemColor]| in a gradient due to color space issues.

chrome/browser/cocoa/wrench_menu_button_cell.mm

 // Copyright (c) 2010 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 "chrome/browser/cocoa/wrench_menu_button_cell.h"
 
 #include "base/scoped_nsobject.h"
 
 @implementation WrenchMenuButtonCell
 
 - (void)drawBezelWithFrame:(NSRect)frame inView:(NSView*)controlView {
   [NSGraphicsContext saveGraphicsState];
 
   // Inset the rect to match the appearance of the layout of interface builder.
   // The bounding rect of buttons is actually larger than the display rect shown
   // there.
   frame = NSInsetRect(frame, 0.0, 1.0);
 
   // Stroking the rect gives a weak stroke.  Filling and insetting gives a
   // strong, un-anti-aliased border.
   [[NSColor colorWithDeviceWhite:0.663 alpha:1.0] set];
   NSRectFill(frame);
   frame = NSInsetRect(frame, 1.0, 1.0);
 
   NSColor* start = [NSColor whiteColor];
   NSColor* end = [NSColor colorWithDeviceWhite:0.922 alpha:1.0];
   if ([self isHighlighted]) {
     start = [NSColor colorWithDeviceRed:0.396 green:0.641 blue:0.941 alpha:1.0];
-    end = [NSColor selectedMenuItemColor];
+    end = [NSColor colorWithDeviceRed:0.157 green:0.384 blue:0.929 alpha:1.0];
   }
 
   scoped_nsobject<NSGradient> gradient(
       [[NSGradient alloc] initWithStartingColor:start
                                     endingColor:end]);
   [gradient drawInRect:frame angle:90.0];
 
   [NSGraphicsContext restoreGraphicsState];
 }
 
 - (NSBackgroundStyle)interiorBackgroundStyle {
   if ([self isHighlighted])
     return NSBackgroundStyleDark;
   return [super interiorBackgroundStyle];
 }
 
 @end