Fix sky include guards to match Chromium style

sky/engine/core/css/DOMWindowCSS.h

 /*
  * Copyright (C) 2012 Motorola Mobility 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.
  * 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.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
  * OWNER 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
  * (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 DOMWindowCSS_h
-#define DOMWindowCSS_h
+#ifndef SKY_ENGINE_CORE_CSS_DOMWINDOWCSS_H_
+#define SKY_ENGINE_CORE_CSS_DOMWINDOWCSS_H_
 
 #include "sky/engine/bindings/core/v8/ScriptWrappable.h"
 #include "sky/engine/platform/heap/Handle.h"
 #include "sky/engine/wtf/Forward.h"
 #include "sky/engine/wtf/PassRefPtr.h"
 #include "sky/engine/wtf/RefCounted.h"
 
 namespace blink {
 
 class DOMWindowCSS : public RefCounted<DOMWindowCSS>, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
 public:
     static PassRefPtr<DOMWindowCSS> create();
 
     bool supports(const String& property, const String& value) const;
     bool supports(const String& conditionText) const;
 
 private:
     DOMWindowCSS()
     {
     }
 };
 
 } // namespace blink
 
-#endif
+#endif  // SKY_ENGINE_CORE_CSS_DOMWINDOWCSS_H_