Add CORS support for <link> elements.

Source/core/loader/TextTrackLoader.cpp

Index: Source/core/loader/TextTrackLoader.cpp
diff --git a/Source/core/loader/TextTrackLoader.cpp b/Source/core/loader/TextTrackLoader.cpp
index 8973f07a5cb51aa7504fed0f7a438e85153e4f1d..a6691c2d32b612cc0d79a199979d81f395531dfb 100644
--- a/Source/core/loader/TextTrackLoader.cpp
+++ b/Source/core/loader/TextTrackLoader.cpp
@@ -104,15 +104,14 @@ void TextTrackLoader::notifyFinished(Resource* resource)
     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);