Explicitly test same/cross-origin importScripts() effect on worker.onerror.

LayoutTests/http/tests/resources/js-test-pre.js

Index: LayoutTests/http/tests/resources/js-test-pre.js
diff --git a/LayoutTests/http/tests/resources/js-test-pre.js b/LayoutTests/http/tests/resources/js-test-pre.js
index f4f502f00db641d00a2e2ca9c2c241bf9a92eca0..319277ba0cc48130067ac638ce201477ec28d814 100644
--- a/LayoutTests/http/tests/resources/js-test-pre.js
+++ b/LayoutTests/http/tests/resources/js-test-pre.js
@@ -72,10 +72,12 @@ var description, debug, successfullyParsed, errorMessage;
     if (!isWorker())
         insertStyleSheet();
 
-    self.onerror = function(message)
-    {
-        errorMessage = message;
-    };
+    if (!self.isOnErrorTest) {

[do-not-use, 2013/07/24 15:11:29]

nit: Should we update LayoutTests/fast/js/resources/js-test-pre.js as well for
consistency?

[do-not-use, 2013/07/24 15:11:29]

Should we update LayoutTests/fast/js/resources/js-test-pre.js as well for
consistency?

[Mike West, 2013/07/24 15:21:57]

We should, good idea. I'll add that.

+        self.onerror = function(message)
+        {
+            errorMessage = message;
+        };
+    }
 
 })();