Send synchronous loads through the cache.

LayoutTests/http/tests/xmlhttprequest/logout.html

Index: LayoutTests/http/tests/xmlhttprequest/logout.html
diff --git a/LayoutTests/http/tests/xmlhttprequest/logout.html b/LayoutTests/http/tests/xmlhttprequest/logout.html
index 82e187a0d2ce7f6372789d7997cfd56a08ee114b..e20b3d79a3f3a703966f1e1ebe4788cafb2cc08c 100644
--- a/LayoutTests/http/tests/xmlhttprequest/logout.html
+++ b/LayoutTests/http/tests/xmlhttprequest/logout.html
@@ -41,7 +41,7 @@ document.getElementById("login").innerHTML = isAuthenticated() ? "PASS" : "FAIL"
 
 // Test that a request sent before logout actually has credentials.
 var r = new XMLHttpRequest;
-r.open("GET", "resources/logout/resource.php?isAuthenticated", true);
+r.open("GET", "resources/logout/resource.php?isAuthenticated2", true);
 r.onload = function() {
     document.getElementById("async").innerHTML = r.status == 200 ? "PASS" : "FAIL";