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

ui/gfx/gdi_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_GDI_UTIL_H_
 #define UI_GFX_GDI_UTIL_H_
 
 #include <vector>
 #include <windows.h>
 
-#include "ui/base/ui_export.h"
+#include "ui/gfx/gfx_export.h"
 #include "ui/gfx/rect.h"
 #include "ui/gfx/path.h"
 
 namespace gfx {
 
 // Creates a BITMAPINFOHEADER structure given the bitmap's size.
 UI_EXPORT void CreateBitmapHeader(int width, int height, BITMAPINFOHEADER* hdr);
 
 // Creates a BITMAPINFOHEADER structure given the bitmap's size and
 // color depth in bits per pixel.
@@ skipping 22 matching lines @@
 UI_EXPORT bool ScaleDC(HDC dc, double scale_factor);
 
 UI_EXPORT void StretchDIBits(HDC hdc,
                              int dest_x, int dest_y, int dest_w, int dest_h,
                              int src_x, int src_y, int src_w, int src_h,
                              void* pixels, const BITMAPINFO* bitmap_info);
 
 }  // namespace gfx
 
 #endif  // UI_GFX_GDI_UTIL_H_