Fix sky include guards to match Chromium style

sky/engine/core/html/parser/HTMLParserIdioms.h

 /*
  * Copyright (C) 2010 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
  *     documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef HTMLParserIdioms_h
-#define HTMLParserIdioms_h
+#ifndef SKY_ENGINE_CORE_HTML_PARSER_HTMLPARSERIDIOMS_H_
+#define SKY_ENGINE_CORE_HTML_PARSER_HTMLPARSERIDIOMS_H_
 
 #include "sky/engine/core/dom/QualifiedName.h"
 #include "sky/engine/platform/Decimal.h"
 #include "sky/engine/wtf/Forward.h"
 #include "sky/engine/wtf/text/WTFString.h"
 
 namespace WTF {
 class TextEncoding;
 }
 
@@ skipping 84 matching lines @@
 
 inline static String attemptStaticStringCreation(const String str)
 {
     if (!str.is8Bit())
         return attemptStaticStringCreation(str.characters16(), str.length(), Force16Bit);
     return attemptStaticStringCreation(str.characters8(), str.length());
 }
 
 
 }
-#endif
+#endif  // SKY_ENGINE_CORE_HTML_PARSER_HTMLPARSERIDIOMS_H_