Add more missing closing namespace comments.

third_party/WebKit/Source/core/css/parser/SizesAttributeParser.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/css/parser/SizesAttributeParser.h"
 
 #include "core/MediaTypeNames.h"
 #include "core/css/MediaQueryEvaluator.h"
 #include "core/css/parser/CSSTokenizer.h"
 #include "core/css/parser/SizesCalcParser.h"
@@ skipping 83 matching lines @@
         return m_length;
     return effectiveSizeDefaultValue();
 }
 
 unsigned SizesAttributeParser::effectiveSizeDefaultValue()
 {
     // Returning the equivalent of "100vw"
     return m_mediaValues->viewportWidth();
 }
 
-} // namespace
+} // namespace blink