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

views/widget/native_widget_private.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_PRIVATE_H_
 #define VIEWS_WIDGET_NATIVE_WIDGET_PRIVATE_H_
 #pragma once
 
 #include "ui/gfx/native_widget_types.h"
 #include "views/ime/input_method_delegate.h"
@@ skipping 78 matching lines @@
   virtual Widget* GetTopLevelWidget() = 0;
 
   // Returns the Compositor, or NULL if there isn't one associated with this
   // NativeWidget.
   virtual const ui::Compositor* GetCompositor() const = 0;
   virtual ui::Compositor* GetCompositor() = 0;
 
   // See description in View for details.
   virtual void MarkLayerDirty() = 0;
   virtual void CalculateOffsetToAncestorWithLayer(gfx::Point* offset,
-                                                  View** ancestor) = 0;
+                                                  ui::Layer** layer_parent) = 0;
 
   // Notifies the NativeWidget that a view was removed from the Widget's view
   // hierarchy.
   virtual void ViewRemoved(View* view) = 0;
 
   // Sets/Gets a native window property on the underlying native window object.
   // Returns NULL if the property does not exist. Setting the property value to
   // NULL removes the property.
   virtual void SetNativeWindowProperty(const char* name, void* value) = 0;
   virtual void* GetNativeWindowProperty(const char* name) const = 0;
@@ skipping 96 matching lines @@
       const Widget* ancestor, gfx::Point* point) const = 0;
 
   // Overridden from NativeWidget:
   virtual internal::NativeWidgetPrivate* AsNativeWidgetPrivate() OVERRIDE;
 };
 
 }  // namespace internal
 }  // namespace views
 
 #endif  // VIEWS_WIDGET_NATIVE_WIDGET_PRIVATE_H_