Remove last dependencies on ui/base from ui/gfx

ui/gfx/image/image.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.
 
 // An Image wraps an image any flavor, be it platform-native GdkBitmap/NSImage,
 // or a SkBitmap. This also provides easy conversion to other image types
 // through operator overloading. It will cache the converted representations
 // internally to prevent double-conversion.
 //
 // The lifetime of both the initial representation and any converted ones are
@@ skipping 35 matching lines @@
 
 #if defined(TOOLKIT_GTK)
 class CairoCachedSurface;
 #endif
 
 namespace internal {
 class ImageRep;
 class ImageStorage;
 }
 
-class UI_EXPORT Image {
+class GFX_EXPORT Image {
  public:
   enum RepresentationType {
     kImageRepGdk,
     kImageRepCocoa,
     kImageRepCocoaTouch,
     kImageRepCairo,
     kImageRepSkia,
     kImageRepPNG,
   };
 
@@ skipping 135 matching lines @@
   // be cheaply copied.
   scoped_refptr<internal::ImageStorage> storage_;
 
   friend class ::ImageTest;
   friend class ::ImageMacTest;
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_IMAGE_IMAGE_H_