Add an error page for resources blocked via XSS Auditor.

third_party/WebKit/LayoutTests/http/tests/security/xssAuditor/resources/utilities.js

 function checkIfFrameLocationMatchesSrcAndCallDone(frameId)
 {
     if (!window.testRunner)
         return;
 
     var actualURL = 'unavailable', frame = document.getElementById(frameId);
     try {
         actualURL = frame.contentWindow.location.href;
     }
     catch (e) {
         actualURL = '[Location object access threw exception]';
     }
 
     if (actualURL != frame.src)
         alert('URL mismatch: \'' + actualURL + '\' vs. \'' + frame.src + '\'');
 
     testRunner.notifyDone();
 }
 
+function checkFrameIsCrossOriginAndCallDone(frameId) {
+    if (!window.testRunner)
+        return;
+
+    var actualURL = 'unavailable', frame = document.getElementById(frameId);
+    try {
+        actualURL = frame.contentWindow.location.href;
+        console.log('FAIL: "' + frameId + '" loaded "' + actualURL + '".');
+    }
+    catch (e) {
+        actualURL = '[Location object access threw exception]';
+        console.log('PASS: "' + frameId + '" is cross-origin.');
+    }
+
+    testRunner.notifyDone();
+}
+
 function sendRequestFromIFrame(url, params, HTTPMethod, callbackWhenDone)
 {
     if (!params || !params.length)
         return;
         
     if (!HTTPMethod)
         HTTPMethod = 'GET';
         
     if (document.getElementById('frame'))
         document.body.removeChild(document.getElementById('frame'));
@@ skipping 19 matching lines @@
 
 
 function notifyDoneAfterReceivingLoaded()
 {
     window.addEventListener("message", function(event) {
         if (event.data == "loaded")
             testRunner.notifyDone();
     }, false);
 }