ui/base/cocoa: Change auto to not deduce raw pointers.

ui/base/cocoa/nscolor_additions.mm

 // Copyright 2015 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 "ui/base/cocoa/nscolor_additions.h"
 
 #include "base/mac/foundation_util.h"
 #import "base/mac/sdk_forward_declarations.h"
 #include "base/macros.h"
 
 @implementation NSColor (ChromeAdditions)
 
 - (CGColorRef)cr_CGColor {
   // Redirect to -[NSColor CGColor] if available because it caches.
   static BOOL redirect =
       [NSColor instancesRespondToSelector:@selector(CGColor)];
   if (redirect)
     return [self CGColor];
 
   const NSInteger numberOfComponents = [self numberOfComponents];
   std::vector<CGFloat> components(numberOfComponents, 0.0);
   [self getComponents:components.data()];
-  auto color = CGColorCreate([[self colorSpace] CGColorSpace],
-                             components.data());
+  auto* color =
+      CGColorCreate([[self colorSpace] CGColorSpace], components.data());
   base::mac::CFTypeRefToNSObjectAutorelease(color);
   return color;
 }
 
 @end