Add referrerpolicy support to link prefetch

third_party/WebKit/Source/core/loader/LinkLoader.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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 93 matching lines @@
   static bool getResourceTypeFromAsAttribute(const String& as, Resource::Type&);
 
   DECLARE_TRACE();
 
  private:
   explicit LinkLoader(LinkLoaderClient*);
 
   void linkLoadTimerFired(TimerBase*);
   void linkLoadingErrorTimerFired(TimerBase*);
   void createLinkPreloadResourceClient(Resource*);
+  void prefetchIfNeeded(Document&,
+                        const KURL& href,
+                        const LinkRelAttribute&,
+                        CrossOriginAttributeValue,
+                        ReferrerPolicy);
 
   Member<LinkLoaderClient> m_client;
 
   Timer<LinkLoader> m_linkLoadTimer;
   Timer<LinkLoader> m_linkLoadingErrorTimer;
 
   Member<PrerenderHandle> m_prerender;
   Member<LinkPreloadResourceClient> m_linkPreloadResourceClient;
 };
 
 }  // namespace blink
 
 #endif