Provide an API to the example window manager app that supports closing a window.

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_private.h"
 #include "mojo/services/public/cpp/view_manager/lib/view_tree_node_private.h"
@@ skipping 268 matching lines @@
 ////////////////////////////////////////////////////////////////////////////////
 // ViewTreeNode, protected:
 
 ViewTreeNode::ViewTreeNode()
     : manager_(NULL),
       id_(-1),
       parent_(NULL),
       active_view_(NULL) {}
 
 ViewTreeNode::~ViewTreeNode() {
-  ScopedDestructionNotifier notifier(this);
-  if (parent_)
-    parent_->LocalRemoveChild(this);
-  if (manager_)
-    ViewManagerPrivate(manager_).RemoveNode(id_);
+  {
+    // TODO(beng): I'm not sure I like these scoped destruction notifiers.
+    //             When they fall out of scope |this| is toast.
+    ScopedDestructionNotifier notifier(this);
+    if (parent_)
+      parent_->LocalRemoveChild(this);
+    if (manager_)
+      ViewManagerPrivate(manager_).RemoveNode(id_);
+  }
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // ViewTreeNode, private:
 
 ViewTreeNode::ViewTreeNode(ViewManager* manager)
     : manager_(manager),
       id_(ViewManagerPrivate(manager).synchronizer()->CreateViewTreeNode()),
       parent_(NULL),
       active_view_(NULL) {}
@@ skipping 28 matching lines @@
 void ViewTreeNode::LocalSetBounds(const gfx::Rect& old_bounds,
                                   const gfx::Rect& new_bounds) {
   DCHECK(old_bounds == bounds_);
   ScopedSetBoundsNotifier notifier(this, old_bounds, new_bounds);
   bounds_ = new_bounds;
 }
 
 }  // namespace view_manager
 }  // namespace mojo