Remove last dependencies on ui/base from ui/gfx

ui/gfx/image/image_skia_rep.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_REP_H_
 #define UI_GFX_IMAGE_IMAGE_SKIA_REP_H_
 
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/gfx/gfx_export.h"
 #include "ui/gfx/size.h"
 
 namespace gfx {
 
 // An ImageSkiaRep represents a bitmap and the scale factor it is intended for.
-class UI_EXPORT ImageSkiaRep {
+class GFX_EXPORT ImageSkiaRep {
  public:
   // Create null bitmap.
   ImageSkiaRep();
   ~ImageSkiaRep();
 
   // Creates a bitmap with kARGB_8888_Config config with given |size| in DIP.
   // This allocates pixels in the bitmap.
   ImageSkiaRep(const gfx::Size& size, float scale);
 
   // Creates a bitmap with given scale.
@@ skipping 24 matching lines @@
   friend class ImageSkia;
   SkBitmap& mutable_sk_bitmap() { return bitmap_; }
 
   SkBitmap bitmap_;
   float scale_;
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_IMAGE_IMAGE_SKIA_REP_H_