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

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
 // tied to the lifetime of the Image's internal storage. To allow Images to be
 // cheaply passed around by value, the actual image data is stored in a ref-
 // counted member. When all Images referencing this storage are deleted, the
 // actual representations are deleted, too.
 //
 // Images can be empty, in which case they have no backing representation.
 // Attempting to use an empty Image will result in a crash.
 
 #ifndef UI_GFX_IMAGE_IMAGE_H_
 #define UI_GFX_IMAGE_IMAGE_H_
 
 #include <map>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/gtest_prod_util.h"
 #include "base/memory/ref_counted_memory.h"
-#include "ui/base/ui_export.h"
+#include "ui/gfx/gfx_export.h"
 #include "ui/gfx/native_widget_types.h"
 
 #if defined(OS_MACOSX) && !defined(OS_IOS)
 typedef struct CGColorSpace* CGColorSpaceRef;
 #endif
 
 class SkBitmap;
 
 namespace {
 class ImageTest;
@@ skipping 163 matching lines @@
   // be cheaply copied.
   scoped_refptr<internal::ImageStorage> storage_;
 
   friend class ::ImageTest;
   friend class ::ImageMacTest;
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_IMAGE_IMAGE_H_