Add more missing closing namespace comments.

third_party/WebKit/Source/core/html/parser/ResourcePreloader.h

 // 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.
 
 #ifndef ResourcePreloader_h
 #define ResourcePreloader_h
 
 #include "core/CoreExport.h"
 #include "core/html/parser/PreloadRequest.h"
 
 namespace blink {
 
 class NetworkHintsInterface;
 
 class CORE_EXPORT ResourcePreloader {
 public:
     virtual void takeAndPreload(PreloadRequestStream&);
 private:
     virtual void preload(PassOwnPtr<PreloadRequest>, const NetworkHintsInterface&) = 0;
 };
 
-}
+} // namespace blink
 
 #endif