Add more missing closing namespace comments.

third_party/WebKit/Source/core/page/PagePopupClient.h

 /*
  * Copyright (C) 2012 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 77 matching lines @@
     static void addProperty(const char* name, const Vector<String>& values, SharedBuffer*);
     static void addProperty(const char* name, const IntRect&, SharedBuffer*);
 };
 
 inline void PagePopupClient::addString(const String& str, SharedBuffer* data)
 {
     CString str8 = str.utf8();
     data->append(str8.data(), str8.length());
 }
 
-}
+} // namespace blink
 #endif