Cleanup: IWYU for base/gtest_prod_util.h.

ui/base/win/hwnd_subclass.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_BASE_WIN_HWND_SUBCLASS_H_
 #define UI_BASE_WIN_HWND_SUBCLASS_H_
 
 #include <windows.h>
 #include <vector>
 
-#include "base/gtest_prod_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/base/ui_base_export.h"
 #include "ui/base/view_prop.h"
 
 namespace ui {
 
 // Classes implementing this interface get the opportunity to handle and consume
 // messages before they are sent to their target HWND.
 class UI_BASE_EXPORT HWNDMessageFilter {
  public:
@@ skipping 52 matching lines @@
   std::vector<HWNDMessageFilter*> filters_;
   WNDPROC original_wnd_proc_;
   ui::ViewProp prop_;
 
   DISALLOW_COPY_AND_ASSIGN(HWNDSubclass);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_WIN_HWND_SUBCLASS_H_