Add more missing closing namespace comments.

third_party/WebKit/Source/core/css/CSSFontFeatureValue.h

 /*
  * Copyright (C) 2011 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 37 matching lines @@
 
 private:
     CSSFontFeatureValue(const AtomicString& tag, int value);
 
     AtomicString m_tag;
     const int m_value;
 };
 
 DEFINE_CSS_VALUE_TYPE_CASTS(CSSFontFeatureValue, isFontFeatureValue());
 
-} // namespace
+} // namespace blink
 
 #endif