Fix sky include guards to match Chromium style

sky/engine/core/dom/ExceptionCode.h

 /*
  *  Copyright (C) 2006, 2007 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 ExceptionCode_h
-#define ExceptionCode_h
+#ifndef SKY_ENGINE_CORE_DOM_EXCEPTIONCODE_H_
+#define SKY_ENGINE_CORE_DOM_EXCEPTIONCODE_H_
 
 namespace blink {
 
     // The DOM standards use unsigned short for exception codes.
     // In our DOM implementation we use int instead, and use different
     // numerical ranges for different types of DOM exception, so that
     // an exception of any type can be expressed with a single integer.
     typedef int ExceptionCode;
 
 
@@ skipping 54 matching lines @@
     enum V8ErrorType {
         V8GeneralError = 1000,
         V8TypeError,
         V8RangeError,
         V8SyntaxError,
         V8ReferenceError,
     };
 
 } // namespace blink
 
-#endif // ExceptionCode_h
+#endif  // SKY_ENGINE_CORE_DOM_EXCEPTIONCODE_H_