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

views/widget/native_widget_gtk.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_gtk.h"
 
 #include <gdk/gdk.h>
 #include <gdk/gdkx.h>
 #include <X11/extensions/shape.h>
 #include <X11/Xatom.h>
@@ skipping 838 matching lines @@
   return compositor_.get();
 }
 
 ui::Compositor* NativeWidgetGtk::GetCompositor() {
   return compositor_.get();
 }
 
 void NativeWidgetGtk::MarkLayerDirty() {
 }
 
-void NativeWidgetGtk::CalculateOffsetToAncestorWithLayer(gfx::Point* offset,
-                                                         View** ancestor) {
+void NativeWidgetGtk::CalculateOffsetToAncestorWithLayer(
+    gfx::Point* offset,
+    ui::Layer** layer_parent) {
 }
 
 void NativeWidgetGtk::ViewRemoved(View* view) {
   if (drop_target_.get())
     drop_target_->ResetTargetViewIfEquals(view);
 }
 
 void NativeWidgetGtk::SetNativeWindowProperty(const char* name, void* value) {
   g_object_set_data(G_OBJECT(widget_), name, value);
 }
@@ skipping 1390 matching lines @@
     button_pressed = event->type == GDK_BUTTON_PRESS ||
         event->type == GDK_2BUTTON_PRESS ||
         event->type == GDK_3BUTTON_PRESS;
     gdk_event_free(event);
   }
   return button_pressed;
 }
 
 }  // namespace internal
 }  // namespace views