Apply meta tag referrer policy for preloaded requests

Source/core/html/parser/HTMLResourcePreloader.cpp

 /*
  * Copyright (C) 2013 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 32 matching lines @@
 PassOwnPtrWillBeRawPtr<HTMLResourcePreloader> HTMLResourcePreloader::create(Document& document)
 {
     return adoptPtrWillBeNoop(new HTMLResourcePreloader(document));
 }
 
 DEFINE_TRACE(HTMLResourcePreloader)
 {
     visitor->trace(m_document);
 }
 
+void HTMLResourcePreloader::preloadReferrerPolicy(const String& policy)
+{
+    m_document->processReferrerPolicy(policy);
+}
+
 static void preconnectHost(PreloadRequest* request)
 {
     ASSERT(request);
     ASSERT(request->isPreconnect());
     KURL host(request->baseURL(), request->resourceURL());
     if (!host.isValid() || !host.protocolIsInHTTPFamily())
         return;
     CrossOriginAttributeValue crossOrigin = CrossOriginAttributeNotSet;
     if (request->isCORS()) {
         if (request->isAllowCredentials())
@@ skipping 19 matching lines @@
     if (request.url().protocolIsData())
         return;
     if (preload->resourceType() == Resource::Script || preload->resourceType() == Resource::CSSStyleSheet || preload->resourceType() == Resource::ImportResource)
         request.setCharset(preload->charset().isEmpty() ? m_document->charset().string() : preload->charset());
     request.setForPreload(true);
     Platform::current()->histogramCustomCounts("WebCore.PreloadDelayMs", static_cast<int>(1000 * (monotonicallyIncreasingTime() - preload->discoveryTime())), 0, 2000, 20);
     m_document->loader()->startPreload(preload->resourceType(), request);
 }
 
 } // namespace blink