Throw exceptions on all failed cross-origin access checks.

LayoutTests/http/tests/security/inactive-document-with-empty-security-origin.html

 <script>
 (function() {
 
 if (location.hash == "#stop")
     return;
 
 if (window.testRunner) {
     testRunner.dumpAsText();
     testRunner.waitUntilDone();
     testRunner.setCanOpenWindows();
     testRunner.setCloseRemainingWindowsWhenComplete(true);
 }
 
 blankWindow = open(location + "#stop");
 blankWindow.onload = function() {
     blankFunc = blankWindow.Function;
     blankWindow.opener = null;
     blankWindow.eval("location = 'about:blank'");
 
     setTimeout(function() {
-        blankFunc = blankFunc("return window.Function")();
+        try {
+            blankFunc = blankFunc("return window.Function")();
+        } catch (e) {
+            blankFunc = false;
+        }
         if (!blankFunc && window.testRunner) {
             testRunner.notifyDone()
             return;
         }
         blankFunc("alertFunc", "(" + function() {
             targetWindow = open("http://localhost:8080/security/resources/post-done-to-opener.html");
             targetFunc = targetWindow.Function;
             this.alertFunc = alertFunc;
 
             targetWindow.addEventListener("load", function() {
                 alertFunc(targetFunc("return document.documentElement.innerHTML")());
             });
         } + ")()")( function(s) { alert(s) });
     }, 0);
 }
 
 window.addEventListener('message', function(evt) {
     if (evt.data == 'done') {
         if (window.testRunner)
             testRunner.notifyDone();
     }
 });
 
 })();
 </script>
 This test passes if it doesn't alert something ugly.