Remove config.h

sky/engine/wtf/TypeTraits.h

  /*
  * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2009, 2010 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */
 
 #ifndef SKY_ENGINE_WTF_TYPETRAITS_H_
 #define SKY_ENGINE_WTF_TYPETRAITS_H_
 
+#include <cstddef>
 #include <utility>
 
 namespace WTF {
 
     // The following are provided in this file:
     //
     //   IsInteger<T>::value
     //   IsPod<T>::value, see the definition for a note about its limitations
     //   IsConvertibleToInteger<T>::value
     //
@@ skipping 267 matching lines @@
     template<typename From> class IsPointerConvertible<From, blink::JSONValue> {
     public:
         enum {
             Value = true
         };
     };
 
 } // namespace WTF
 
 #endif  // SKY_ENGINE_WTF_TYPETRAITS_H_