Add more missing closing namespace comments.

third_party/WebKit/Source/core/fetch/ClientHintsPreferences.cpp

 // Copyright 2015 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/fetch/ClientHintsPreferences.h"
 
 #include "core/fetch/ResourceFetcher.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "platform/network/HTTPParsers.h"
 
@@ skipping 32 matching lines @@
         m_shouldSendResourceWidth = true;
     }
 
     if (acceptClientHintsHeader.contains("viewport-width")) {
         if (fetcher)
             fetcher->context().countClientHintsViewportWidth();
         m_shouldSendViewportWidth = true;
     }
 }
 
-}
+} // namespace blink