Add more missing closing namespace comments.

third_party/WebKit/Source/core/fetch/CachedMetadata.h

 /*
  * Copyright (C) 2010 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 103 matching lines @@
 
     // Serialization offsets. Format: [DATA_TYPE_ID][DATA].
     static const size_t dataTypeIDStart = 0;
     static const size_t dataStart = sizeof(unsigned);
 
     // Since the serialization format supports random access, storing it in
     // serialized form avoids need for a copy during serialization.
     Vector<char> m_serializedData;
 };
 
-}
+} // namespace blink
 
 #endif