Add more missing closing namespace comments.

third_party/WebKit/Source/core/testing/DictionaryTest.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "DictionaryTest.h"
 
 #include "bindings/core/v8/V8ObjectBuilder.h"
 #include "core/testing/InternalDictionary.h"
 #include "core/testing/InternalDictionaryDerived.h"
 
@@ skipping 170 matching lines @@
 }
 
 DEFINE_TRACE(DictionaryTest)
 {
     visitor->trace(m_elementMember);
     visitor->trace(m_elementOrNullMember);
     visitor->trace(m_doubleOrStringSequenceMember);
     visitor->trace(m_eventTargetOrNullMember);
 }
 
-}
+} // namespace blink