Rename RenderNode to RenderObject.

sky/sdk/lib/framework/rendering/stack.dart

 // Copyright 2015 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.
 
 import 'dart:sky' as sky;
 import 'box.dart';
-import 'node.dart';
+import 'object.dart';
 
 class StackParentData extends BoxParentData with ContainerParentDataMixin<RenderBox> { }
 
-class RenderStack extends RenderBox with ContainerRenderNodeMixin<RenderBox, StackParentData>,
+class RenderStack extends RenderBox with ContainerRenderObjectMixin<RenderBox, StackParentData>,
                                          RenderBoxContainerDefaultsMixin<RenderBox, StackParentData> {
   RenderStack({
     List<RenderBox> children
   }) {
     if (children != null)
       children.forEach((child) { add(child); });
   }
 
   void setParentData(RenderBox child) {
     if (child.parentData is! StackParentData)
@@ skipping 17 matching lines @@
       assert(child.parentData is StackParentData);
       child.parentData.position = origin;
       child = child.parentData.nextSibling;
     }
   }
 
   void hitTestChildren(HitTestResult result, { sky.Point position }) {
     defaultHitTestChildren(result, position: position);
   }
 
-  void paint(RenderNodeDisplayList canvas) {
+  void paint(RenderObjectDisplayList canvas) {
     defaultPaint(canvas);
   }
 }