Replace scoped_ptr with std::unique_ptr in //ui

ui/gfx/image/image_skia_util_mac.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 "ui/gfx/image/image_skia_util_mac.h"
 
-#include <cmath>
-#include <limits>
-
 #import <AppKit/AppKit.h>
 #include <stddef.h>
 
+#include <cmath>
+#include <limits>
+#include <memory>
+
 #include "base/mac/mac_util.h"
 #include "base/mac/scoped_nsobject.h"
-#include "base/memory/scoped_ptr.h"
 #include "skia/ext/skia_utils_mac.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/gfx/image/image_skia.h"
 
 namespace {
 
 // Returns NSImageRep whose pixel size most closely matches |desired_size|.
 NSImageRep* GetNSImageRepWithPixelSize(NSImage* image,
                                        NSSize desired_size) {
   float smallest_diff = std::numeric_limits<float>::max();
@@ skipping 83 matching lines @@
     [image addRepresentation:
         skia::SkBitmapToNSBitmapImageRepWithColorSpace(it->sk_bitmap(),
                                                       color_space)];
   }
 
   [image setSize:NSMakeSize(image_skia.width(), image_skia.height())];
   return [image.release() autorelease];
 }
 
 }  // namespace gfx