Remove support for <link rel=subresource>

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 189 matching lines @@
         break;
     case Resource::CSSStyleSheet:
         m_linkPreloadResourceClient = LinkPreloadStyleResourceClient::create(this, toCSSStyleSheetResource(resource.get()));
         break;
     case Resource::Font:
         m_linkPreloadResourceClient = LinkPreloadFontResourceClient::create(this, toFontResource(resource.get()));
         break;
     case Resource::Media:
     case Resource::TextTrack:
     case Resource::Raw:
-    case Resource::LinkSubresource:
+    case Resource::LinkPreload:
         m_linkPreloadResourceClient = LinkPreloadRawResourceClient::create(this, toRawResource(resource.get()));
         break;
     default:
         ASSERT_NOT_REACHED();
     }
 }
 
 static ResourcePtr<Resource> preloadIfNeeded(const LinkRelAttribute& relAttribute, const KURL& href, Document& document, const String& as, LinkCaller caller)
 {
     if (!document.loader() || !relAttribute.isLinkPreload())
@@ skipping 58 matching lines @@
 
     preconnectIfNeeded(relAttribute, href, document, crossOrigin, networkHintsInterface, LinkCalledFromMarkup);
 
     if (m_client->shouldLoadLink())
         createLinkPreloadResourceClient(preloadIfNeeded(relAttribute, href, document, as, LinkCalledFromMarkup));
 
     if (href.isEmpty() || !href.isValid())
         released();
 
     // FIXME(crbug.com/323096): Should take care of import.
-    if ((relAttribute.isLinkPrefetch() || relAttribute.isLinkSubresource()) && href.isValid() && document.frame()) {
+    if (relAttribute.isLinkPrefetch() && href.isValid() && document.frame()) {
         if (!m_client->shouldLoadLink())
             return false;
-        Resource::Type type = Resource::LinkPrefetch;
-        if (relAttribute.isLinkSubresource()) {
-            type = Resource::LinkSubresource;
-            UseCounter::count(document, UseCounter::LinkRelSubresource);
-        } else {
-            UseCounter::count(document, UseCounter::LinkRelPrefetch);
-        }
+        UseCounter::count(document, UseCounter::LinkRelPrefetch);
 
         FetchRequest linkRequest(ResourceRequest(document.completeURL(href)), FetchInitiatorTypeNames::link);
         if (crossOrigin != CrossOriginAttributeNotSet)
             linkRequest.setCrossOriginAccessControl(document.securityOrigin(), crossOrigin);
-        setResource(LinkFetchResource::fetch(type, linkRequest, document.fetcher()));
+        setResource(LinkFetchResource::fetch(Resource::LinkPrefetch, 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 18 matching lines @@
 
 DEFINE_TRACE(LinkLoader)
 {
     visitor->trace(m_client);
     visitor->trace(m_prerender);
     visitor->trace(m_linkPreloadResourceClient);
     ResourceOwner<Resource, ResourceClient>::trace(visitor);
 }
 
 } // namespace blink