Adds an iOS implementation of gfx::Image.

ui/gfx/image/image_skia_util_ios.h

+// 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.
+
+#ifndef UI_GFX_IMAGE_IMAGE_SKIA_UTIL_IOS_H_
+#define UI_GFX_IMAGE_IMAGE_SKIA_UTIL_IOS_H_
+
+#include "ui/base/ui_export.h"
+
+#ifdef __OBJC__
+@class UIImage;
+#else
+class UIImage;
+#endif
+
+namespace gfx {
+class ImageSkia;
+
+// Converts to ImageSkia from UIImage.
+UI_EXPORT gfx::ImageSkia ImageSkiaFromUIImage(UIImage* image);
+
+// Converts to UIImage from ImageSkia.  Returns an autoreleased UIImage.
+UI_EXPORT UIImage* UIImageFromImageSkia(const gfx::ImageSkia& image_skia);
+
+}  // namespace gfx
+
+#endif  // UI_GFX_IMAGE_IMAGE_SKIA_UTIL_IOS_H_