Extend AXTreeSourceViews to handle aura::Window and views::Widget.

chrome/browser/ui/views/accessibility/automation_manager_views.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 CHROME_BROWSER_UI_VIEWS_ACCESSIBILITY_AUTOMATION_MANAGER_VIEWS_H_
-#define CHROME_BROWSER_UI_VIEWS_ACCESSIBILITY_AUTOMATION_MANAGER_VIEWS_H_
-
-#include "base/basictypes.h"
-#include "base/memory/scoped_ptr.h"
-
-#include "ui/accessibility/ax_tree_serializer.h"
-#include "ui/views/accessibility/ax_tree_source_views.h"
-
-template <typename T> struct DefaultSingletonTraits;
-
-class Profile;
-
-namespace views {
-class View;
-}  // namespace views
-
-// Manages a tree of automation nodes.
-class AutomationManagerViews {
- public:
-  // Get the single instance of this class.
-  static AutomationManagerViews* GetInstance();
-
-  // Handle an event fired upon a |View|.
-  void HandleEvent(Profile* profile, views::View* view, ui::AXEvent event_type);
-
- private:
-  friend struct DefaultSingletonTraits<AutomationManagerViews>;
-
-  AutomationManagerViews();
-  ~AutomationManagerViews();
-
-  // Holds the active views-based accessibility tree. A tree currently consists
-  // of all views descendant to a |Widget| (see |AXTreeSourceViews|).
-  // A tree becomes active when an event is fired on a descendant view.
-  scoped_ptr <views::AXTreeSourceViews> current_tree_;
-
-  // Serializes incremental updates on the currently active tree
-  // |current_tree_|.
-  scoped_ptr<ui::AXTreeSerializer<views::View*> > current_tree_serializer_;
-
-  DISALLOW_COPY_AND_ASSIGN(AutomationManagerViews);
-};
-
-#endif  // CHROME_BROWSER_UI_VIEWS_ACCESSIBILITY_AUTOMATION_MANAGER_VIEWS_H_