Add more missing closing namespace comments.

third_party/WebKit/Source/core/layout/PointerEventsHitRules.h

 /*
     Copyright (C) 2007 Rob Buis <buis@kde.org>
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
     version 2 of the License, or (at your option) any later version.
 
     This library is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 27 matching lines @@
     PointerEventsHitRules(EHitTesting, const HitTestRequest&, EPointerEvents);
 
     unsigned requireVisible : 1;
     unsigned requireFill : 1;
     unsigned requireStroke : 1;
     unsigned canHitStroke : 1;
     unsigned canHitFill : 1;
     unsigned canHitBoundingBox : 1;
 };
 
-}
+} // namespace blink
 
 #endif