Add more missing closing namespace comments.

third_party/WebKit/Source/modules/webdatabase/SQLTransactionCallback.h

 /*
  * Copyright (C) 2007 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:
  *Transaction
  * 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 24 matching lines @@
 
 class SQLTransaction;
 
 class SQLTransactionCallback : public GarbageCollectedFinalized<SQLTransactionCallback> {
 public:
     virtual ~SQLTransactionCallback() { }
     DEFINE_INLINE_VIRTUAL_TRACE() { }
     virtual bool handleEvent(SQLTransaction*) = 0;
 };
 
-}
+} // namespace blink
 
 #endif // SQLTransactionCallback_h