Nesting

mojo/services/public/cpp/view_manager/view_manager_delegate.h

+// 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.
+
+#ifndef MOJO_SERVICES_PUBLIC_CPP_VIEW_MANAGER_VIEW_MANAGER_DELEGATE_H_
+#define MOJO_SERVICES_PUBLIC_CPP_VIEW_MANAGER_VIEW_MANAGER_DELEGATE_H_
+
+namespace mojo {
+namespace view_manager {
+
+class ViewManager;
+class ViewTreeNode;
+
+class ViewManagerDelegate {
+ public:
+  virtual void OnRootAdded(ViewManager* view_manager, ViewTreeNode* root) {}
+  virtual void OnRootRemoved(ViewManager* view_manager, ViewTreeNode* root) {}
+
+ protected:
+  virtual ~ViewManagerDelegate() {}
+};
+
+}  // namespace view_manager
+}  // namespace mojo
+
+#endif  // MOJO_SERVICES_PUBLIC_CPP_VIEW_MANAGER_VIEW_MANAGER_DELEGATE_H_