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

views/widget/native_widget_aura.h

 // 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.
 
 #ifndef VIEWS_WIDGET_NATIVE_WIDGET_AURA_H_
 #define VIEWS_WIDGET_NATIVE_WIDGET_AURA_H_
 #pragma once
 
 #include "aura/window_delegate.h"
 #include "views/widget/native_widget_private.h"
@@ skipping 21 matching lines @@
   virtual bool ShouldUseNativeFrame() const OVERRIDE;
   virtual void FrameTypeChanged() OVERRIDE;
   virtual Widget* GetWidget() OVERRIDE;
   virtual const Widget* GetWidget() const OVERRIDE;
   virtual gfx::NativeView GetNativeView() const OVERRIDE;
   virtual gfx::NativeWindow GetNativeWindow() const OVERRIDE;
   virtual Widget* GetTopLevelWidget() OVERRIDE;
   virtual const ui::Compositor* GetCompositor() const OVERRIDE;
   virtual ui::Compositor* GetCompositor() OVERRIDE;
   virtual void MarkLayerDirty() OVERRIDE;
-  virtual void CalculateOffsetToAncestorWithLayer(gfx::Point* offset,
-                                                  View** ancestor) OVERRIDE;
+  virtual void CalculateOffsetToAncestorWithLayer(
+      gfx::Point* offset,
+      ui::Layer** layer_parent) OVERRIDE;
   virtual void ViewRemoved(View* view) OVERRIDE;
   virtual void SetNativeWindowProperty(const char* name, void* value) OVERRIDE;
   virtual void* GetNativeWindowProperty(const char* name) const OVERRIDE;
   virtual TooltipManager* GetTooltipManager() const OVERRIDE;
   virtual bool IsScreenReaderActive() const OVERRIDE;
   virtual void SendNativeAccessibilityEvent(
       View* view,
       ui::AccessibilityTypes::Event event_type) OVERRIDE;
   virtual void SetMouseCapture() OVERRIDE;
   virtual void ReleaseMouseCapture() OVERRIDE;
@@ skipping 71 matching lines @@
 
   // See class documentation for Widget in widget.h for a note about ownership.
   Widget::InitParams::Ownership ownership_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeWidgetAura);
 };
 
 }  // namespace views
 
 #endif  // VIEWS_WIDGET_NATIVE_WIDGET_AURA_H_