Improve handling of CORS redirects for some resource loads.

Source/core/fetch/CrossOriginAccessControl.h

Index: Source/core/fetch/CrossOriginAccessControl.h
diff --git a/Source/core/fetch/CrossOriginAccessControl.h b/Source/core/fetch/CrossOriginAccessControl.h
index 450c342253f38f973a310707154d51168955f776..a96536f553a472e670855a4c2cc1266d66c29d6f 100644
--- a/Source/core/fetch/CrossOriginAccessControl.h
+++ b/Source/core/fetch/CrossOriginAccessControl.h
@@ -37,6 +37,9 @@ namespace WebCore {
 typedef HashSet<String, CaseFoldingHash> HTTPHeaderSet;
 
 class HTTPHeaderMap;
+class Resource;
+struct ResourceLoaderOptions;
+class ResourceRequest;
 class ResourceResponse;
 class SecurityOrigin;
 
@@ -45,6 +48,12 @@ enum AccessControlStatus {
     SharableCrossOrigin
 };
 
+class CrossOriginAccessControl {
+public:
+    static bool isLegalRedirectLocation(const KURL&, String& errorDescription);
+    static bool handleRedirect(Resource*, SecurityOrigin*, ResourceRequest&, const ResourceResponse&, ResourceLoaderOptions&, String&);
+};
+
 bool isSimpleCrossOriginAccessRequest(const String& method, const HTTPHeaderMap&);
 bool isOnAccessControlSimpleRequestMethodWhitelist(const String&);
 bool isOnAccessControlSimpleRequestHeaderWhitelist(const AtomicString& name, const AtomicString& value);