Add more missing closing namespace comments.

third_party/WebKit/Source/core/svg/animation/SVGSMILElement.h

 /*
  * Copyright (C) 2008 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
@@ skipping 270 matching lines @@
 };
 
 inline bool isSVGSMILElement(const SVGElement& element)
 {
     return element.hasTagName(SVGNames::setTag) || element.hasTagName(SVGNames::animateTag) || element.hasTagName(SVGNames::animateMotionTag)
         || element.hasTagName(SVGNames::animateTransformTag) || element.hasTagName((SVGNames::discardTag));
 }
 
 DEFINE_SVGELEMENT_TYPE_CASTS_WITH_FUNCTION(SVGSMILElement);
 
-}
+} // namespace blink
 
 #endif // SVGSMILElement_h