DevTools: Make sure ElementsTreeOutline is correctly rendered when element's hasChildren state chan…

LayoutTests/inspector/elements/undo-dom-edits.html

Index: LayoutTests/inspector/elements/undo-dom-edits.html
diff --git a/LayoutTests/inspector/elements/undo-dom-edits.html b/LayoutTests/inspector/elements/undo-dom-edits.html
index 1c062c4be85237b9d650de8c3d4003c7135f45bf..29b52c30276f9e52ea49b3a131d9cdd8bdca76af 100644
--- a/LayoutTests/inspector/elements/undo-dom-edits.html
+++ b/LayoutTests/inspector/elements/undo-dom-edits.html
@@ -10,7 +10,13 @@ function test()
 
     function testSetUp(next)
     {
-        InspectorTest.expandElementsTree(next);
+        InspectorTest.addResult("Setting up");
+        InspectorTest.expandElementsTree(callback);
+
+        function callback()
+        {
+            InspectorTest.expandElementsTree(next);
+        }
     }
     testSuite.push(testSetUp);