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

ui/gfx/image/cairo_cached_surface.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_CAIRO_CACHED_SURFACE_H_
 #define UI_GFX_IMAGE_CAIRO_CACHED_SURFACE_H_
 
 #include <vector>
 
-#include "ui/base/ui_export.h"
+#include "ui/gfx/gfx_export.h"
 
 typedef struct _GdkDisplay GdkDisplay;
 typedef struct _GdkPixbuf GdkPixbuf;
 typedef struct _GtkWidget GtkWidget;
 typedef struct _cairo cairo_t;
 typedef struct _cairo_surface cairo_surface_t;
 
 namespace gfx {
 
 // A helper class that takes a GdkPixbuf* and renders it to the screen. Unlike
@@ skipping 54 matching lines @@
 
   // Our list of cached surfaces. 99% of the time, this will only contain a
   // single entry. At most two. We need to get this right for multiple displays
   // to work correct, since each GdkDisplay is a different display server.
   mutable SurfaceVector surface_map_;
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_IMAGE_CAIRO_CACHED_SURFACE_H_