Rework View Layer Draw() to use the Layer::DrawTree() method and the LayerDelegate.

views/widget/native_widget_aura.cc

Index: views/widget/native_widget_aura.cc
===================================================================
--- views/widget/native_widget_aura.cc	(revision 100773)
+++ views/widget/native_widget_aura.cc	(working copy)
@@ -114,10 +114,11 @@
   //NOTIMPLEMENTED();
 }
 
-void NativeWidgetAura::CalculateOffsetToAncestorWithLayer(gfx::Point* offset,
-                                                         View** ancestor) {
-  if (ancestor)
-    *ancestor = GetWidget()->GetRootView();
+void NativeWidgetAura::CalculateOffsetToAncestorWithLayer(
+    gfx::Point* offset,
+    ui::Layer** layer_parent) {
+  if (layer_parent)
+    *layer_parent = window_->layer();
 }
 
 void NativeWidgetAura::ViewRemoved(View* view) {