Add more missing closing namespace comments.

third_party/WebKit/Source/core/dom/RawDataDocumentParser.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:
  * 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 35 matching lines @@
 
 private:
     void insert(const SegmentedString&) final {}
 
     void append(const String&) final
     {
         ASSERT_NOT_REACHED();
     }
 };
 
-};
+} // namespace blink;
 
 #endif // RawDataDocumentParser_h