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

ui/gfx/native_widget_types.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_NATIVE_WIDGET_TYPES_H_
 #define UI_GFX_NATIVE_WIDGET_TYPES_H_
 
 #include "build/build_config.h"
 
 #if defined(OS_ANDROID)
 #include <jni.h>
 #endif
 
 #include "base/basictypes.h"
 #include "base/logging.h"
-#include "ui/base/ui_export.h"
+#include "ui/gfx/gfx_export.h"
 
 // This file provides cross platform typedefs for native widget types.
 //   NativeWindow: this is a handle to a native, top-level window
 //   NativeView: this is a handle to a native UI element. It may be the
 //     same type as a NativeWindow on some platforms.
 //   NativeViewId: Often, in our cross process model, we need to pass around a
 //     reference to a "window". This reference will, say, be echoed back from a
 //     renderer to the browser when it wishes to query its size. On Windows we
 //     use an HWND for this.
 //
@@ skipping 294 matching lines @@
 #elif defined(USE_OZONE)
 typedef intptr_t AcceleratedWidget;
 const AcceleratedWidget kNullAcceleratedWidget = 0;
 #else
 #error unknown platform
 #endif
 
 }  // namespace gfx
 
 #endif  // UI_GFX_NATIVE_WIDGET_TYPES_H_