It is time.

ui/accessibility/ax_node.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_NODE_H_
-#define UI_ACCESSIBILITY_AX_NODE_H_
-
-#include "ui/accessibility/ax_node_data.h"
-
-namespace ui {
-
-// One node in an AXTree.
-class AX_EXPORT AXNode {
- public:
-  // The constructor requires a parent, id, and index in parent, but
-  // the data is not required. After initialization, only index_in_parent
-  // is allowed to change, the others are guaranteed to never change.
-  AXNode(AXNode* parent, int32 id, int32 index_in_parent);
-  virtual ~AXNode();
-
-  // Accessors.
-  int32 id() const { return data_.id; }
-  AXNode* parent() const { return parent_; }
-  int child_count() const { return static_cast<int>(children_.size()); }
-  const AXNodeData& data() const { return data_; }
-  const std::vector<AXNode*>& children() const { return children_; }
-  int index_in_parent() const { return index_in_parent_; }
-
-  // Get the child at the given index.
-  AXNode* ChildAtIndex(int index) const { return children_[index]; }
-
-  // Set the node's accessibility data. This may be done during initial
-  // initialization or later when the node data changes.
-  void SetData(const AXNodeData& src);
-
-  // Update this node's location. This is separate from SetData just because
-  // changing only the location is common and should be more efficient than
-  // re-copying all of the data.
-  void SetLocation(const gfx::Rect& new_location);
-
-  // Set the index in parent, for example if siblings were inserted or deleted.
-  void SetIndexInParent(int index_in_parent);
-
-  // Swap the internal children vector with |children|. This instance
-  // now owns all of the passed children.
-  void SwapChildren(std::vector<AXNode*>& children);
-
-  // This is called when the AXTree no longer includes this node in the
-  // tree. Reference counting is used on some platforms because the
-  // operating system may hold onto a reference to an AXNode
-  // object even after we're through with it, so this may decrement the
-  // reference count and clear out the object's data.
-  void Destroy();
-
-  // Return true if this object is equal to or a descendant of |ancestor|.
-  bool IsDescendantOf(AXNode* ancestor);
-
- private:
-  int index_in_parent_;
-  AXNode* parent_;
-  std::vector<AXNode*> children_;
-  AXNodeData data_;
-};
-
-
-}  // namespace ui
-
-#endif  // UI_ACCESSIBILITY_AX_NODE_H_