It is time.

ui/accessibility/ax_serializable_tree.h

-// Copyright 2013 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 UI_ACCESSIBILITY_AX_SERIALIZABLE_TREE_H_
-#define UI_ACCESSIBILITY_AX_SERIALIZABLE_TREE_H_
-
-#include "ui/accessibility/ax_tree.h"
-#include "ui/accessibility/ax_tree_source.h"
-
-namespace ui {
-
-class AX_EXPORT AXSerializableTree : public AXTree {
- public:
-  AXSerializableTree();
-  explicit AXSerializableTree(const AXTreeUpdate& initial_state);
-  ~AXSerializableTree() override;
-
-  // Create a TreeSource adapter for this tree. The client gets ownership
-  // of the return value and should delete it when done.
-  virtual AXTreeSource<const AXNode*>* CreateTreeSource();
-};
-
-}  // namespace ui
-
-#endif  // UI_ACCESSIBILITY_AX_TREE_H_