Remove blink::Resource::Type::LinkPrefetch and replace it by a flag

third_party/WebKit/Source/core/loader/LinkLoader.cpp

 /*
  * 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 346 matching lines @@
     if (href.isEmpty() || !href.isValid())
         released();
 
     // FIXME(crbug.com/323096): Should take care of import.
     if (relAttribute.isLinkPrefetch() && href.isValid() && document.frame()) {
         if (!m_client->shouldLoadLink())
             return false;
         UseCounter::count(document, UseCounter::LinkRelPrefetch);
 
         FetchRequest linkRequest(ResourceRequest(document.completeURL(href)), FetchInitiatorTypeNames::link);
+        linkRequest.setIsPrefetch(true);
         if (crossOrigin != CrossOriginAttributeNotSet)
             linkRequest.setCrossOriginAccessControl(document.getSecurityOrigin(), crossOrigin);
-        setResource(LinkFetchResource::fetch(Resource::LinkPrefetch, linkRequest, document.fetcher()));
+        setResource(LinkFetchResource::fetch(Resource::MainResource, linkRequest, document.fetcher()));
     }
 
     if (const unsigned prerenderRelTypes = prerenderRelTypesFromRelAttribute(relAttribute, document)) {
         if (!m_prerender) {
             m_prerender = PrerenderHandle::create(document, this, href, prerenderRelTypes);
         } else if (m_prerender->url() != href) {
             m_prerender->cancel();
             m_prerender = PrerenderHandle::create(document, this, href, prerenderRelTypes);
         }
         // TODO(gavinp): Handle changes to rel types of existing prerenders.
@@ skipping 19 matching lines @@
 DEFINE_TRACE(LinkLoader)
 {
     visitor->trace(m_client);
     visitor->trace(m_prerender);
     visitor->trace(m_linkPreloadResourceClient);
     ResourceOwner<Resource, ResourceClient>::trace(visitor);
     PrerenderClient::trace(visitor);
 }
 
 } // namespace blink