Fix sky include guards to match Chromium style

sky/engine/core/css/resolver/MatchResult.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2013 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 MatchResult_h
-#define MatchResult_h
+#ifndef SKY_ENGINE_CORE_CSS_RESOLVER_MATCHRESULT_H_
+#define SKY_ENGINE_CORE_CSS_RESOLVER_MATCHRESULT_H_
 
 #include "sky/engine/core/css/RuleSet.h"
 #include "sky/engine/core/css/SelectorChecker.h"
 #include "sky/engine/platform/heap/Handle.h"
 #include "sky/engine/wtf/RefPtr.h"
 #include "sky/engine/wtf/Vector.h"
 
 namespace blink {
 
 class StylePropertySet;
@@ skipping 58 matching lines @@
     return a.properties == b.properties;
 }
 
 inline bool operator!=(const MatchedProperties& a, const MatchedProperties& b)
 {
     return !(a == b);
 }
 
 } // namespace blink
 
-#endif // MatchResult_h
+#endif  // SKY_ENGINE_CORE_CSS_RESOLVER_MATCHRESULT_H_