Add CORS support for <link> elements.

Source/core/loader/TextTrackLoader.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:
  * 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 86 matching lines @@
 
     if (m_state == Finished && m_cueParser)
         m_cueParser->flush();
 
     if (!m_cueLoadTimer.isActive())
         m_cueLoadTimer.startOneShot(0);
 
     cancelLoad();
 }
 
-bool TextTrackLoader::load(const KURL& url, const String& crossOriginMode)
+bool TextTrackLoader::load(const KURL& url, const AtomicString& crossOriginMode)
 {
     cancelLoad();
 
     FetchRequest cueRequest(ResourceRequest(m_document.completeURL(url)), FetchInitiatorTypeNames::texttrack);
 
     if (!crossOriginMode.isNull()) {
-        StoredCredentials allowCredentials = equalIgnoringCase(crossOriginMode, "use-credentials") ? AllowStoredCredentials : DoNotAllowStoredCredentials;
-        cueRequest.setCrossOriginAccessControl(m_document.securityOrigin(), allowCredentials);
+        cueRequest.setCrossOriginAccessControl(m_document.securityOrigin(), crossOriginMode);
     } else if (!m_document.securityOrigin()->canRequest(url)) {
         // Text track elements without 'crossorigin' set on the parent are "No CORS"; report error if not same-origin.
         corsPolicyPreventedLoad(m_document.securityOrigin(), url);
         return false;
     }
 
     ResourceFetcher* fetcher = m_document.fetcher();
     setResource(fetcher->fetchRawResource(cueRequest));
     return resource();
 }
@@ skipping 32 matching lines @@
 }
 
 void TextTrackLoader::getNewRegions(Vector<RefPtr<VTTRegion> >& outputRegions)
 {
     ASSERT(m_cueParser);
     if (m_cueParser)
         m_cueParser->getNewRegions(outputRegions);
 }
 
 }