Fix problems with cross-origin redirects.

Source/core/xml/XMLHttpRequest.cpp

Index: Source/core/xml/XMLHttpRequest.cpp
diff --git a/Source/core/xml/XMLHttpRequest.cpp b/Source/core/xml/XMLHttpRequest.cpp
index d173c522bc6d67eb7b44572d4980ae953a30ff6a..578ba5880acb23c193edda9e8c7f3e0e9e81fcca 100644
--- a/Source/core/xml/XMLHttpRequest.cpp
+++ b/Source/core/xml/XMLHttpRequest.cpp
@@ -749,6 +749,7 @@ void XMLHttpRequest::createRequest(ExceptionCode& ec)
     options.sniffContent = DoNotSniffContent;
     options.preflightPolicy = uploadEvents ? ForcePreflight : ConsiderPreflight;
     options.allowCredentials = (m_sameOriginRequest || m_includeCredentials) ? AllowStoredCredentials : DoNotAllowStoredCredentials;
+    options.credentialsRequested = m_includeCredentials ? ClientRequestedCredentials : ClientDidNotRequestCredentials;
     options.crossOriginRequestPolicy = UseAccessControl;
     options.securityOrigin = securityOrigin();
     options.initiator = cachedResourceRequestInitiators().xmlhttprequest;