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

ui/gfx/skbitmap_operations.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_SKBITMAP_OPERATIONS_H_
 #define UI_GFX_SKBITMAP_OPERATIONS_H_
 
 #include "base/gtest_prod_util.h"
-#include "ui/base/ui_export.h"
 #include "ui/gfx/color_utils.h"
+#include "ui/gfx/gfx_export.h"
 #include "ui/gfx/shadow_value.h"
 
 namespace gfx {
 class Point;
 class Size;
 }
 
 class SkBitmap;
 
 class UI_EXPORT SkBitmapOperations {
@@ skipping 100 matching lines @@
   static SkBitmap Rotate(const SkBitmap& source, RotationAmount rotation);
 
  private:
   SkBitmapOperations();  // Class for scoping only.
 
   FRIEND_TEST_ALL_PREFIXES(SkBitmapOperationsTest, DownsampleByTwo);
   FRIEND_TEST_ALL_PREFIXES(SkBitmapOperationsTest, DownsampleByTwoSmall);
 };
 
 #endif  // UI_GFX_SKBITMAP_OPERATIONS_H_