Only execute default actions on trusted events.

LayoutTests/fast/forms/select-list-box-mouse-focus.html

Index: LayoutTests/fast/forms/select-list-box-mouse-focus.html
diff --git a/LayoutTests/fast/forms/select-list-box-mouse-focus.html b/LayoutTests/fast/forms/select-list-box-mouse-focus.html
index 50326506db8afd361e53eeb56121e709061d1a83..3c12014ffdbef40ff1ee41d900e298629c87ea1c 100644
--- a/LayoutTests/fast/forms/select-list-box-mouse-focus.html
+++ b/LayoutTests/fast/forms/select-list-box-mouse-focus.html
@@ -4,11 +4,14 @@ function test()
     if (window.testRunner)
         testRunner.dumpAsText();
     var select = document.getElementById("select");
-    var x = select.clientLeft + 10;
-    var y = select.clientTop + 10;
-    var event = document.createEvent("MouseEvent");
-    event.initMouseEvent("mousedown", true, true, document.defaultView, 1, x, y, x, y, false, false, false, false, 0, document);
-    select.dispatchEvent(event);
+    var rect = select.getBoundingClientRect();
+    var x = rect.left + 10;
+    var y = rect.top + 10;
+
+    if (window.eventSender) {
+        eventSender.mouseMoveTo(x, y);
+        eventSender.mouseDown(0);
+    }
 }
 function reportFocus()
 {