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

chrome/browser/ui/ash/accessibility/ax_root_obj_wrapper.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_ASH_ACCESSIBILITY_AX_ROOT_OBJ_WRAPPER_H_
+#define CHROME_BROWSER_UI_ASH_ACCESSIBILITY_AX_ROOT_OBJ_WRAPPER_H_
+
+#include "base/basictypes.h"
+#include "ui/views/accessibility/ax_aura_obj_wrapper.h"
+
+class AXRootObjWrapper : public views::AXAuraObjWrapper {
+ public:
+  explicit AXRootObjWrapper(int32 id);
+  virtual ~AXRootObjWrapper();
+
+  // Convenience method to check for existence of a child.
+  bool HasChild(views::AXAuraObjWrapper* child);
+
+  // views::AXAuraObjWrapper overrides.
+  virtual views::AXAuraObjWrapper* GetParent() OVERRIDE;
+  virtual void GetChildren(
+      std::vector<views::AXAuraObjWrapper*>* out_children) OVERRIDE;
+  virtual void Serialize(ui::AXNodeData* out_node_data) OVERRIDE;
+  virtual int32 GetID() OVERRIDE;
+
+ private:
+  int32 id_;
+
+  DISALLOW_COPY_AND_ASSIGN(AXRootObjWrapper);
+};
+
+#endif  // CHROME_BROWSER_UI_ASH_ACCESSIBILITY_AX_ROOT_OBJ_WRAPPER_H_