Cleanup: Update the path to gfx size headers.

ui/gfx/image/image_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.h"
 
 #import <AppKit/AppKit.h>
 
 #include "base/logging.h"
 #include "base/mac/scoped_nsobject.h"
+#include "ui/gfx/geometry/size.h"
 #include "ui/gfx/image/image_png_rep.h"
-#include "ui/gfx/size.h"
 
 namespace gfx {
 namespace internal {
 
 namespace {
 
 // Returns a 16x16 red NSImage to visually show when a NSImage cannot be
 // created from PNG data.
 // Caller takes ownership of the returned NSImage.
 NSImage* GetErrorNSImage() {
@@ skipping 79 matching lines @@
 gfx::Size NSImageSize(NSImage* image) {
   NSSize size = [image size];
   int width = static_cast<int>(size.width);
   int height = static_cast<int>(size.height);
   return gfx::Size(width, height);
 }
 
 } // namespace internal
 } // namespace gfx