Rewrite most of the scopers in //base/mac to use ScopedTypeRef or ScopedGeneric.

chrome/browser/ui/cocoa/gradient_button_cell.mm

 // Copyright (c) 2012 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/ui/cocoa/gradient_button_cell.h"
 
 #include <cmath>
 
 #include "base/logging.h"
 #include "base/mac/mac_util.h"
@@ skipping 357 matching lines @@
         themeProvider->HasCustomImage(IDR_THEME_BUTTON_BACKGROUND)) {
       backgroundImageColor =
           themeProvider->GetNSImageColorNamed(IDR_THEME_BUTTON_BACKGROUND);
     }
     useThemeGradient = backgroundImageColor ? YES : NO;
   }
 
   // The basic gradient shown inside; see above.
   NSGradient* gradient;
   if (hoverAlpha == 0 && !useThemeGradient) {
-    gradient = defaultGradient ? defaultGradient
-                               : gradient_;
+    gradient = defaultGradient ? defaultGradient : gradient_.get();
   } else {
     gradient = [self gradientForHoverAlpha:hoverAlpha
                                   isThemed:useThemeGradient];
   }
 
   // If we're drawing a background image, show that; else possibly show the
   // clicked gradient.
   if (backgroundImageColor) {
     [backgroundImageColor set];
     // Set the phase to match window.
@@ skipping 397 matching lines @@
                              options:options
                                owner:self
                             userInfo:nil]);
   if (isMouseInside_ != mouseInView) {
     [self setMouseInside:mouseInView animate:NO];
     [controlView setNeedsDisplay:YES];
   }
 }
 
 @end