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

ui/gfx/display.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_DISPLAY_H_
 #define UI_GFX_DISPLAY_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
-#include "ui/base/ui_export.h"
+#include "ui/gfx/gfx_export.h"
 #include "ui/gfx/rect.h"
 
 namespace gfx {
 
 // Note: The screen and display currently uses pixel coordinate
 // system. For platforms that support DIP (density independent pixel),
 // |bounds()| and |work_area| will return values in DIP coordinate
 // system, not in backing pixels.
 class UI_EXPORT Display {
  public:
@@ skipping 86 matching lines @@
   int64 id_;
   Rect bounds_;
   Rect work_area_;
   float device_scale_factor_;
   Rotation rotation_;
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_DISPLAY_H_