Switch to standard integer types in ui/gfx/.

ui/gfx/image/image_ios.mm

 // Copyright 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 "ui/gfx/image/image.h"
 
+#include <stddef.h>
 #import <UIKit/UIKit.h>
 #include <cmath>
 #include <limits>
 
 #include "base/logging.h"
 #include "base/mac/scoped_cftyperef.h"
 #include "base/mac/scoped_nsobject.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/gfx/image/image_png_rep.h"
 #include "ui/gfx/image/image_skia.h"
@@ skipping 108 matching lines @@
 }
 
 gfx::Size UIImageSize(UIImage* image) {
   int width = static_cast<int>(image.size.width);
   int height = static_cast<int>(image.size.height);
   return gfx::Size(width, height);
 }
 
 } // namespace internal
 } // namespace gfx