Add more missing closing namespace comments.

third_party/WebKit/Source/core/xml/parser/XMLParserInput.h

 /*
  * Copyright (C) 2013 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 55 matching lines @@
     const char* data() const { return m_data; }
     int size() const { return m_size; }
 
 private:
     String m_source;
     const char* m_encoding;
     const char* m_data;
     int m_size;
 };
 
-}
+} // namespace blink
 
 #endif