Fix sky include guards to match Chromium style

sky/engine/core/css/CSSComputedStyleDeclaration.h

 /*
  * Copyright (C) 2004 Zack Rusin <zack@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2008, 2012 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser 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
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  * 02110-1301  USA
  */
 
-#ifndef CSSComputedStyleDeclaration_h
-#define CSSComputedStyleDeclaration_h
+#ifndef SKY_ENGINE_CORE_CSS_CSSCOMPUTEDSTYLEDECLARATION_H_
+#define SKY_ENGINE_CORE_CSS_CSSCOMPUTEDSTYLEDECLARATION_H_
 
 #include "sky/engine/core/css/CSSStyleDeclaration.h"
 #include "sky/engine/core/rendering/style/RenderStyleConstants.h"
 #include "sky/engine/platform/fonts/FixedPitchFontType.h"
 #include "sky/engine/wtf/HashMap.h"
 #include "sky/engine/wtf/RefPtr.h"
 #include "sky/engine/wtf/text/AtomicString.h"
 #include "sky/engine/wtf/text/AtomicStringHash.h"
 #include "sky/engine/wtf/text/WTFString.h"
 
@@ skipping 74 matching lines @@
     RefPtr<Node> m_node;
     PseudoId m_pseudoElementSpecifier;
     bool m_allowVisitedStyle;
 #if !ENABLE(OILPAN)
     unsigned m_refCount;
 #endif
 };
 
 } // namespace blink
 
-#endif // CSSComputedStyleDeclaration_h
+#endif  // SKY_ENGINE_CORE_CSS_CSSCOMPUTEDSTYLEDECLARATION_H_