First step at synchronizing client model changes with service.

mojo/services/public/cpp/view_manager/lib/view_tree_node.cc

 // Copyright 2014 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 "mojo/services/public/cpp/view_manager/view_tree_node.h"
 
+#include "mojo/services/public/cpp/view_manager/lib/view_manager_private.h"
+#include "mojo/services/public/cpp/view_manager/lib/view_manager_synchronizer.h"
 #include "mojo/services/public/cpp/view_manager/lib/view_tree_node_private.h"
 #include "mojo/services/public/cpp/view_manager/view_tree_node_observer.h"
 
 namespace mojo {
 namespace services {
 namespace view_manager {
 
 void NotifyViewTreeChangeAtReceiver(
     ViewTreeNode* receiver,
     const ViewTreeNodeObserver::TreeChangeParams& params) {
@@ skipping 64 matching lines @@
       std::find(children->begin(), children->end(), child);
   if (it != children->end()) {
     children->erase(it);
     ViewTreeNodePrivate(child).ClearParent();
   }
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // ViewTreeNode, public:
 
-ViewTreeNode::ViewTreeNode() : owned_by_parent_(true), parent_(NULL) {}
+ViewTreeNode::ViewTreeNode()
+    : manager_(NULL),
+      id_(-1),
+      owned_by_parent_(true),
+      parent_(NULL) {}
+
+ViewTreeNode::ViewTreeNode(ViewManager* manager)
+    : manager_(manager),
+      id_(ViewManagerPrivate(manager).synchronizer()->CreateViewTreeNode()),
+      owned_by_parent_(true),
+      parent_(NULL) {}
 
 ViewTreeNode::~ViewTreeNode() {
   while (!children_.empty()) {
     ViewTreeNode* child = children_.front();
     if (child->owned_by_parent_) {
       delete child;
       // Deleting the child also removes it from our child list.
       DCHECK(std::find(children_.begin(), children_.end(), child) ==
              children_.end());
     } else {
@@ skipping 13 matching lines @@
 void ViewTreeNode::RemoveObserver(ViewTreeNodeObserver* observer) {
   observers_.RemoveObserver(observer);
 }
 
 void ViewTreeNode::AddChild(ViewTreeNode* child) {
   ScopedTreeNotifier notifier(child, child->parent(), this);
   if (child->parent())
     RemoveChildImpl(child, &child->parent_->children_);
   children_.push_back(child);
   child->parent_ = this;
+  ViewManagerPrivate(manager_).synchronizer()->AddChild(child->id(), id_);
 }
 
 void ViewTreeNode::RemoveChild(ViewTreeNode* child) {
   DCHECK_EQ(this, child->parent());
   ScopedTreeNotifier(child, this, NULL);
   RemoveChildImpl(child, &children_);
+  ViewManagerPrivate(manager_).synchronizer()->RemoveChild(child->id(), id_);
 }
 
 bool ViewTreeNode::Contains(ViewTreeNode* child) const {
   for (ViewTreeNode* p = child->parent(); p; p = p->parent()) {
     if (p == this)
       return true;
   }
   return false;
 }
 
 }  // namespace view_manager
 }  // namespace services
 }  // namespace mojo