Don't wait for AppCache for link rel preloads

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 284 matching lines @@
     Settings* settings = document.settings();
     if (settings && settings->logPreload())
         document.addConsoleMessage(ConsoleMessage::create(OtherMessageSource, DebugMessageLevel, String("Preload triggered for " + href.host() + href.path())));
     linkRequest.setForPreload(true, monotonicallyIncreasingTime());
     linkRequest.setLinkPreload(true);
     linkRequest.setPriority(document.fetcher()->loadPriority(resourceType, linkRequest));
     return document.loader()->startPreload(resourceType, linkRequest);
 }
 
 void LinkLoader::loadLinksFromHeader(const String& headerValue, const KURL& baseURL, Document* document, const NetworkHintsInterface& networkHintsInterface,
-    CanLoadResources canLoadResources, ViewportDescriptionWrapper* viewportDescriptionWrapper)
+    CanLoadResources canLoadResources, MediaPreloadPolicy mediaPolicy, ViewportDescriptionWrapper* viewportDescriptionWrapper)
 {
     if (!document || headerValue.isEmpty())
         return;
     LinkHeaderSet headerSet(headerValue);
     for (auto& header : headerSet) {
         if (!header.valid() || header.url().isEmpty() || header.rel().isEmpty())
             continue;
 
+        if (mediaPolicy == OnlyLoadMedia && header.media().isEmpty())
+            continue;
+        if (mediaPolicy == OnlyLoadNonMedia && !header.media().isEmpty())
+            continue;
+
         LinkRelAttribute relAttribute(header.rel());
         KURL url(baseURL, header.url());
         // Sanity check to avoid re-entrancy here.
         if (url == baseURL)
             continue;
         if (canLoadResources != OnlyLoadResources) {
             if (RuntimeEnabledFeatures::linkHeaderEnabled())
                 dnsPrefetchIfNeeded(relAttribute, url, *document, networkHintsInterface, LinkCalledFromHeader);
 
             if (RuntimeEnabledFeatures::linkPreconnectEnabled())
@@ skipping 72 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