[Mac] Fix aesthetic issues with themes given the new TopChrome changes....

chrome/browser/cocoa/gradient_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.
 
 #include "chrome/browser/cocoa/gradient_button_cell.h"
 
 #include "base/logging.h"
 #import "base/scoped_nsobject.h"
 #import "chrome/browser/browser_theme_provider.h"
 #import "chrome/browser/cocoa/image_utils.h"
@@ skipping 552 matching lines @@
 
 - (void)drawInteriorWithFrame:(NSRect)cellFrame inView:(NSView*)controlView {
   if (shouldTheme_) {
     BOOL isTemplate = [[self image] isTemplate];
 
     [NSGraphicsContext saveGraphicsState];
 
     CGContextRef context =
         (CGContextRef)([[NSGraphicsContext currentContext] graphicsPort]);
 
-    ThemeProvider* themeProvider = [[controlView window] themeProvider];
+    BrowserThemeProvider* themeProvider = static_cast<BrowserThemeProvider*>(
+        [[controlView window] themeProvider]);
     NSColor* color = themeProvider ?
         themeProvider->GetNSColorTint(BrowserThemeProvider::TINT_BUTTONS,
                                       true) :
         [NSColor blackColor];
 
-    if (isTemplate) {
+    if (isTemplate && themeProvider && themeProvider->UsingDefaultTheme()) {
       scoped_nsobject<NSShadow> shadow([[NSShadow alloc] init]);
-      [shadow setShadowColor:[NSColor colorWithCalibratedWhite:0.96 alpha:1.0]];
+      [shadow setShadowColor:themeProvider->GetNSColor(
+          BrowserThemeProvider::COLOR_TOOLBAR_BEZEL, true)];
       [shadow setShadowOffset:NSMakeSize(0.0, -1.0)];
       [shadow setShadowBlurRadius:1.0];
       [shadow set];
     }
 
     CGContextBeginTransparencyLayer(context, 0);
     NSRect imageRect = NSZeroRect;
     imageRect.size = [[self image] size];
     NSRect drawRect = [self imageRectForBounds:cellFrame];
     [[self image] drawInRect:drawRect
@@ skipping 105 matching lines @@
   NSBezierPath* boundingPath = nil;
   [self getDrawParamsForFrame:cellFrame
                        inView:controlView
                    innerFrame:NULL
                     innerPath:NULL
                      clipPath:&boundingPath];
   return boundingPath;
 }
 
 @end