Add more missing closing namespace comments.

third_party/WebKit/Source/platform/Language.cpp

 /*
  * Copyright (C) 2010, 2013 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:
  * 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 105 matching lines @@
     // provided has both "en-GB" and "en" and the user prefers "en-US" we will return "en".
     if (languageWithoutLocaleMatch.length())
         return languageWithoutLocaleMatchIndex;
 
     if (languageMatchButNotLocale.length())
         return languageMatchButNotLocaleMatchIndex;
 
     return languageList.size();
 }
 
-}
+} // namespace blink