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

ui/gfx/gtk_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_GTK_UTIL_H_
 #define UI_GFX_GTK_UTIL_H_
 
 #include <vector>
 
 #include "base/time/time.h"
-#include "ui/base/ui_export.h"
+#include "ui/gfx/gfx_export.h"
 
 typedef struct _GdkPixbuf GdkPixbuf;
 typedef struct _GdkRegion GdkRegion;
 typedef struct _GdkCursor GdkCursor;
 
 class CommandLine;
 class SkBitmap;
 
 namespace gfx {
 
@@ skipping 21 matching lines @@
 // Initialize some GTK settings so that our dialogs are consistent.
 UI_EXPORT void InitRCStyles();
 
 // Queries GtkSettings for the cursor blink cycle time.  Returns a 0 duration if
 // blinking is disabled.
 UI_EXPORT base::TimeDelta GetCursorBlinkCycle();
 
 }  // namespace gfx
 
 #endif  // UI_GFX_GTK_UTIL_H_