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

views/widget/native_widget_aura.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "views/widget/native_widget_aura.h"
 
 #include "aura/event.h"
 #include "aura/window.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/compositor/layer.h"
@@ skipping 96 matching lines @@
 }
 
 ui::Compositor* NativeWidgetAura::GetCompositor() {
   return window_->layer()->compositor();
 }
 
 void NativeWidgetAura::MarkLayerDirty() {
   //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) {
   NOTIMPLEMENTED();
 }
 
 void NativeWidgetAura::SetNativeWindowProperty(const char* name, void* value) {
   NOTIMPLEMENTED();
 }
 
@@ skipping 344 matching lines @@
 }
 
 // static
 bool NativeWidgetPrivate::IsMouseButtonDown() {
   NOTIMPLEMENTED();
   return false;
 }
 
 }  // namespace internal
 }  // namespace views