Adds a gfx_export.h to ui/gfx and converts all code in ui/gfx to

ui/gfx/skia_util.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_SKIA_UTIL_H_
 #define UI_GFX_SKIA_UTIL_H_
 
 #include <string>
 #include <vector>
 
 #include "skia/ext/refptr.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "third_party/skia/include/core/SkRect.h"
 #include "third_party/skia/include/core/SkShader.h"
-#include "ui/base/ui_export.h"
+#include "ui/gfx/gfx_export.h"
 
 class SkBitmap;
 class SkDrawLooper;
 
 namespace gfx {
 
 class ImageSkiaRep;
 class Rect;
 class RectF;
 class ShadowValue;
@@ skipping 39 matching lines @@
                                const SkBitmap& bitmap2);
 
 // Converts Skia ARGB format pixels in |skia| to RGBA.
 UI_EXPORT void ConvertSkiaToRGBA(const unsigned char* skia,
                                  int pixel_width,
                                  unsigned char* rgba);
 
 }  // namespace gfx
 
 #endif  // UI_GFX_SKIA_UTIL_H_