Throw exceptions on all failed cross-origin access checks.

LayoutTests/http/tests/security/resources/cross-frame-access.js

Index: LayoutTests/http/tests/security/resources/cross-frame-access.js
diff --git a/LayoutTests/http/tests/security/resources/cross-frame-access.js b/LayoutTests/http/tests/security/resources/cross-frame-access.js
index c8063edb4e3e764e53db63026b5a2749815c33f8..3b48f8c82569f19b9d5add97ab4e14d3631d2430 100644
--- a/LayoutTests/http/tests/security/resources/cross-frame-access.js
+++ b/LayoutTests/http/tests/security/resources/cross-frame-access.js
@@ -58,6 +58,17 @@ function canGet(keyPath)
     }
 }
 
+function shouldThrowException(a) {
+    try {
+        var evalA = eval(e);
+        log("FAIL: " + a + " should have thrown an exception, but instead returned " + evalA + ".");
+        return false;
+    } catch (e) {
+        log("PASS: " + a + " should have thrown an exception, and did.");
+        return true;
+    }
+}
+
 function accessThrowsException(keyPath) {
     try {
         eval("window." + keyPath);