mac: Remove implicit conversion from ImageSkia to SkBitmap.

ui/gfx/image/image_skia_util_mac.h

 // 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.
 
 #ifndef UI_GFX_IMAGE_IMAGE_SKIA_UTIL_MAC_H_
 #define UI_GFX_IMAGE_IMAGE_SKIA_UTIL_MAC_H_
 
 #include "ui/base/ui_export.h"
 
 #ifdef __LP64__
@@ skipping 19 matching lines @@
 UI_EXPORT gfx::ImageSkia ImageSkiaFromResizedNSImage(NSImage* image,
                                                      NSSize size);
 
 // Resizes |[NSImage imageNamed:@NSApplicationIcon]| to have edge width of
 // |size| DIP and returns result as ImageSkia.
 UI_EXPORT gfx::ImageSkia ApplicationIconAtSize(int size);
 
 // Converts to NSImage from ImageSkia.
 UI_EXPORT NSImage* NSImageFromImageSkia(const gfx::ImageSkia& image_skia);
 
+// Converts to NSImage from given ImageSkia and a color space.
+UI_EXPORT NSImage* NSImageFromImageSkiaWithColorSpace(
+    const gfx::ImageSkia& image_skia,
+    CGColorSpaceRef color_space);
+
 }  // namespace gfx
 
 #endif  // UI_GFX_IMAGE_IMAGE_SKIA_UTIL_MAC_H_