Throw 'SecurityError' upon cross-origin Location access.

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

Index: LayoutTests/http/tests/security/xssAuditor/resources/utilities.js
diff --git a/LayoutTests/http/tests/security/xssAuditor/resources/utilities.js b/LayoutTests/http/tests/security/xssAuditor/resources/utilities.js
index 7c1ed463089f99959648f33cc49cdfc332b8b0d0..5185d7212f53b64a502b1cdc9811d378ab2cbfbb 100644
--- a/LayoutTests/http/tests/security/xssAuditor/resources/utilities.js
+++ b/LayoutTests/http/tests/security/xssAuditor/resources/utilities.js
@@ -3,14 +3,16 @@ function checkIfFrameLocationMatchesSrcAndCallDone(frameId)
     if (!window.testRunner)
         return;
 
-    var actualURL = 'unavailable', frame = document.getElementById(frameId); 
+    var actualURL = 'unavailable', frame = document.getElementById(frameId);
     try {
         actualURL = frame.contentWindow.location.href;
-    } 
-    catch (e) {}
-    
+    }
+    catch (e) {
+        actualURL = '[Location object access threw exception]';
+    }
+
     if (actualURL != frame.src)
-        alert('URL mismatch: ' + actualURL + ' vs. ' + frame.src);
+        alert('URL mismatch: \'' + actualURL + '\' vs. \'' + frame.src + '\'');
 
     testRunner.notifyDone();
 }