Fix sky include guards to match Chromium style

sky/engine/core/dom/ElementRareData.h

 /*
  * Copyright (C) 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2008 David Smith <catfish.man@gmail.com>
  *
  * 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 ElementRareData_h
-#define ElementRareData_h
+#ifndef SKY_ENGINE_CORE_DOM_ELEMENTRAREDATA_H_
+#define SKY_ENGINE_CORE_DOM_ELEMENTRAREDATA_H_
 
 #include "sky/engine/core/animation/ActiveAnimations.h"
 #include "sky/engine/core/dom/NodeRareData.h"
 #include "sky/engine/core/dom/custom/CustomElementDefinition.h"
 #include "sky/engine/core/dom/shadow/ElementShadow.h"
 #include "sky/engine/core/html/ClassList.h"
 #include "sky/engine/core/html/ime/InputMethodContext.h"
 #include "sky/engine/core/rendering/style/StyleInheritedData.h"
 #include "sky/engine/wtf/OwnPtr.h"
 
@@ skipping 88 matching lines @@
 
 inline ElementRareData::~ElementRareData()
 {
 #if !ENABLE(OILPAN)
     ASSERT(!m_shadow);
 #endif
 }
 
 } // namespace
 
-#endif // ElementRareData_h
+#endif  // SKY_ENGINE_CORE_DOM_ELEMENTRAREDATA_H_