Throw 'SecurityError' upon cross-origin Location access.

LayoutTests/http/tests/plugins/resources/cross-frame-object-access.html

Index: LayoutTests/http/tests/plugins/resources/cross-frame-object-access.html
diff --git a/LayoutTests/http/tests/plugins/resources/cross-frame-object-access.html b/LayoutTests/http/tests/plugins/resources/cross-frame-object-access.html
index f03f2eb11f90eaec03e14fa499f35a72b6cdb240..e223c4207632176927019836325633a84effdbd4 100644
--- a/LayoutTests/http/tests/plugins/resources/cross-frame-object-access.html
+++ b/LayoutTests/http/tests/plugins/resources/cross-frame-object-access.html
@@ -14,11 +14,14 @@ function checkLocationObject(l)
         return false;
     }
 
-    if (l.href) {
-        debug('could access top.location.href');
-        return false;
+    try {
+        if (l.href) {
+            debug('could access top.location.href');
+            return false;
+        }
+    } catch (e) {
+        return true;
     }
-    
     return true;
 }