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

views/widget/native_widget_view.cc

Index: views/widget/native_widget_view.cc
===================================================================
--- views/widget/native_widget_view.cc	(revision 100773)
+++ views/widget/native_widget_view.cc	(working copy)
@@ -52,9 +52,10 @@
   View::MarkLayerDirty();
 }
 
-void NativeWidgetView::CalculateOffsetToAncestorWithLayer(gfx::Point* offset,
-                                                          View** ancestor) {
-  View::CalculateOffsetToAncestorWithLayer(offset, ancestor);
+void NativeWidgetView::CalculateOffsetToAncestorWithLayer(
+    gfx::Point* offset,
+    ui::Layer** layer_parent) {
+  View::CalculateOffsetToAncestorWithLayer(offset, layer_parent);
 }
 
 void NativeWidgetView::ViewHierarchyChanged(bool is_add,
@@ -197,23 +198,5 @@
   }
 }
 
-void NativeWidgetView::PaintToLayer(const gfx::Rect& dirty_rect) {
-  View::PaintToLayer(dirty_rect);
-
-  View* root = GetAssociatedWidget()->GetRootView();
-  gfx::Rect root_dirty_rect = dirty_rect;
-  root->GetTransform().TransformRectReverse(&root_dirty_rect);
-  root_dirty_rect =
-      gfx::Rect(gfx::Point(), root->size()).Intersect(root_dirty_rect);
-
-  if (!root_dirty_rect.IsEmpty())
-    root->PaintToLayer(root_dirty_rect);
-}
-
-void NativeWidgetView::PaintComposite() {
-  View::PaintComposite();
-  GetAssociatedWidget()->GetRootView()->PaintComposite();
-}
-
 }  // namespace internal
 }  // namespace views