Fix sky include guards to match Chromium style

sky/engine/core/css/CSSSupportsRule.h

 /* Copyright (C) 2012 Motorola Mobility Inc. All rights reserved.
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  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
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  * 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.
  * 3. Neither the name of Motorola Mobility Inc. nor the names of its
  *    contributors may be used to endorse or promote products derived from this
  *    software without specific prior written permission.
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-#ifndef CSSSupportsRule_h
-#define CSSSupportsRule_h
+#ifndef SKY_ENGINE_CORE_CSS_CSSSUPPORTSRULE_H_
+#define SKY_ENGINE_CORE_CSS_CSSSUPPORTSRULE_H_
 
 #include "sky/engine/core/css/CSSGroupingRule.h"
 
 namespace blink {
 
 class CSSRule;
 class StyleRuleSupports;
 
 class CSSSupportsRule final : public CSSGroupingRule {
 public:
@@ skipping 10 matching lines @@
     String conditionText() const;
 
 private:
     CSSSupportsRule(StyleRuleSupports*, CSSStyleSheet*);
 };
 
 DEFINE_CSS_RULE_TYPE_CASTS(CSSSupportsRule, SUPPORTS_RULE);
 
 } // namespace blink
 
-#endif // CSSSupportsRule_h
+#endif  // SKY_ENGINE_CORE_CSS_CSSSUPPORTSRULE_H_