Add more missing closing namespace comments.

third_party/WebKit/Source/wtf/LinkedStack.h

 /*
  * Copyright (C) 2013 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 97 matching lines @@
     m_head = m_head->m_next.release();
     --m_size;
 }
 
 template <typename T>
 inline size_t LinkedStack<T>::size()
 {
     return m_size;
 }
 
-}
+} // namespace WTF
 
 using WTF::LinkedStack;
 
 #endif