Try to collect some more data for bug 477631: [Linux] Intermittent Chrome test_bug418874.xul failure

toolkit/content/tests/chrome/test_bug418874.xul

@@ -75,8 +75,10 @@
       synthesizeKey("1", {});
       var t1Enabled = {};
       var t1CanUndo = {};
+      is(t1.value, "1", "t1 value correct following input");
       t1.editor.canUndo(t1Enabled, t1CanUndo);
-      ok(t1CanUndo.value, "undo correctly enabled when emptyText was not changed through property");
+      is(t1CanUndo.value, true,
+         "undo correctly enabled when emptyText was not changed through property");
 
       t2.emptyText = "reallyempty";
       is(t2.inputField.value, "reallyempty", "updated emptyText displayed");
@@ -84,8 +86,10 @@
       synthesizeKey("2", {});
       var t2Enabled = {};
       var t2CanUndo = {};
+      is(t2.value, "2", "t2 value correct following input");
       t2.editor.canUndo(t2Enabled, t2CanUndo);
-      ok(t2CanUndo.value, "undo correctly enabled when emptyText explicitly changed through property");
+      is(t2CanUndo.value, true,
+         "undo correctly enabled when emptyText explicitly changed through property");
    }
 
   ]]></script>