Add missing closing namespace comments to wtf.

third_party/WebKit/Source/wtf/Locker.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
@@ skipping 25 matching lines @@
 template <typename T> class Locker final {
     STACK_ALLOCATED();
     WTF_MAKE_NONCOPYABLE(Locker);
 public:
     Locker(T& lockable) : m_lockable(lockable) { m_lockable.lock(); }
     ~Locker() { m_lockable.unlock(); }
 private:
     T& m_lockable;
 };
 
-}
+} // namespace WTF
 
 using WTF::Locker;
 
 #endif