Fix sky include guards to match Chromium style

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

 /*
  * Copyright (C) 2010 Google, Inc. All Rights Reserved.
  * Copyright (C) 2011 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 GOOGLE INC. ``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 GOOGLE INC. OR
  * 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
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  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef HTMLTreeBuilder_h
-#define HTMLTreeBuilder_h
+#ifndef SKY_ENGINE_CORE_HTML_PARSER_HTMLTREEBUILDER_H_
+#define SKY_ENGINE_CORE_HTML_PARSER_HTMLTREEBUILDER_H_
 
 #include "sky/engine/core/html/parser/HTMLConstructionSite.h"
 #include "sky/engine/core/html/parser/HTMLElementStack.h"
 #include "sky/engine/platform/heap/Handle.h"
 #include "sky/engine/wtf/Noncopyable.h"
 #include "sky/engine/wtf/PassOwnPtr.h"
 #include "sky/engine/wtf/PassRefPtr.h"
 #include "sky/engine/wtf/RefPtr.h"
 #include "sky/engine/wtf/Vector.h"
 #include "sky/engine/wtf/text/StringBuilder.h"
@@ skipping 89 matching lines @@
     // We access parser because HTML5 spec requires that we be able to change the state of the tokenizer
     // from within parser actions. We also need it to track the current position.
     RawPtr<HTMLDocumentParser> m_parser;
 
     RefPtr<Element> m_scriptToProcess; // <script> tag which needs processing before resuming the parser.
     TextPosition m_scriptToProcessStartPosition; // Starting line number of the script tag needing processing.
 };
 
 }
 
-#endif
+#endif  // SKY_ENGINE_CORE_HTML_PARSER_HTMLTREEBUILDER_H_