DevTools: [wip] move Elements panel off WebInspector.domModel and single tree outline.

LayoutTests/http/tests/inspector/inspect-element.html

Index: LayoutTests/http/tests/inspector/inspect-element.html
diff --git a/LayoutTests/http/tests/inspector/inspect-element.html b/LayoutTests/http/tests/inspector/inspect-element.html
index 9996a30d43432020dc1d91f530809450ff2f1528..260c19fa010340127915a0063d92beffe0d1c12e 100644
--- a/LayoutTests/http/tests/inspector/inspect-element.html
+++ b/LayoutTests/http/tests/inspector/inspect-element.html
@@ -6,8 +6,7 @@
 
 function test()
 {
-    WebInspector.inspectorView.showPanel("elements").treeOutline.
-        addEventListener(WebInspector.ElementsTreeOutline.Events.SelectedNodeChanged, selectedNodeChanged, this);
+    InspectorTest.firstElementsTreeOutline().addEventListener(WebInspector.ElementsTreeOutline.Events.SelectedNodeChanged, selectedNodeChanged, this);
     function selectedNodeChanged(event)
     {
         var node = event.data;