Adds more to viewmanager

mojo/services/view_manager/node.cc

Index: mojo/services/view_manager/node.cc
diff --git a/mojo/services/view_manager/node.cc b/mojo/services/view_manager/node.cc
index 1457a7ee6b6ac1785b983567ecbdd826555312ce..e2436dab5aeb96d5f46149465355e37299d2ac54 100644
--- a/mojo/services/view_manager/node.cc
+++ b/mojo/services/view_manager/node.cc
@@ -5,6 +5,7 @@
 #include "mojo/services/view_manager/node.h"
 
 #include "mojo/services/view_manager/node_delegate.h"
+#include "mojo/services/view_manager/view.h"
 #include "ui/aura/window_property.h"
 
 DECLARE_WINDOW_PROPERTY_TYPE(mojo::services::view_manager::Node*);
@@ -18,6 +19,7 @@ DEFINE_WINDOW_PROPERTY_KEY(Node*, kNodeKey, NULL);
 Node::Node(NodeDelegate* delegate, const NodeId& id)
     : delegate_(delegate),
       id_(id),
+      view_(NULL),
       window_(NULL) {
   DCHECK(delegate);  // Must provide a delegate.
   window_.set_owned_by_parent(false);
@@ -26,6 +28,7 @@ Node::Node(NodeDelegate* delegate, const NodeId& id)
 }
 
 Node::~Node() {
+  SetView(NULL);
 }
 
 Node* Node::GetParent() {
@@ -42,6 +45,36 @@ void Node::Remove(Node* child) {
   window_.RemoveChild(&child->window_);
 }
 
+std::vector<Node*> Node::GetChildren() {
+  std::vector<Node*> children;
+  children.reserve(window_.children().size());
+  for (size_t i = 0; i < window_.children().size(); ++i)
+    children.push_back(window_.children()[i]->GetProperty(kNodeKey));
+  return children;
+}
+
+void Node::SetView(View* view) {
+  if (view == view_)
+    return;
+
+  // Detach view from existing node. This way notifications are sent out.
+  if (view && view->node())
+    view->node()->SetView(NULL);
+
+  ViewId old_view_id;
+  if (view_) {
+    view_->set_node(NULL);
+    old_view_id = view_->id();
+  }
+  view_ = view;
+  ViewId view_id;
+  if (view) {
+    view_id = view->id();
+    view->set_node(this);
+  }
+  delegate_->OnNodeViewReplaced(id_, view_id, old_view_id);
+}
+
 void Node::OnWindowHierarchyChanged(
     const aura::WindowObserver::HierarchyChangeParams& params) {
   if (params.target != &window_ || params.receiver != &window_)