Add more missing closing namespace comments.

third_party/WebKit/Source/core/events/NodeEventContext.cpp

 /*
  * Copyright (C) 2014 Google 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 48 matching lines @@
             toMouseEvent(event).setRelatedTarget(relatedTarget());
         } else if (event.isFocusEvent()) {
             toFocusEvent(event).setRelatedTarget(relatedTarget());
         }
     }
     event.setTarget(target());
     event.setCurrentTarget(m_currentTarget.get());
     m_node->handleLocalEvents(event);
 }
 
-}
+} // namespace blink