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

ui/views/accessibility/ax_widget_obj_wrapper.h

Index: ui/views/accessibility/ax_widget_obj_wrapper.h
diff --git a/ui/views/accessibility/ax_widget_obj_wrapper.h b/ui/views/accessibility/ax_widget_obj_wrapper.h
new file mode 100644
index 0000000000000000000000000000000000000000..bed5dfa8fbc65d47e02b8daa7abae00b387bce2d
--- /dev/null
+++ b/ui/views/accessibility/ax_widget_obj_wrapper.h
@@ -0,0 +1,32 @@
+// 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 UI_VIEWS_ACCESSIBILITY_AX_WIDGET_OBJ_WRAPPER_H_
+#define UI_VIEWS_ACCESSIBILITY_AX_WIDGET_OBJ_WRAPPER_H_
+
+#include "ui/views/accessibility/ax_node_source_obj_wrapper.h"
+
+namespace views {
+
+class Widget;
+
+class AXWidgetObjWrapper : public AXNodeSourceObjWrapper {
+ public:
+  explicit AXWidgetObjWrapper(Widget* widget) : widget_(widget) {}
+  virtual ~AXWidgetObjWrapper() {}
+
+  virtual AXNodeSourceObjWrapper* GetParent() OVERRIDE;
+  virtual void GetChildren(
+      std::vector<AXNodeSourceObjWrapper*>* out_children) OVERRIDE;
+  virtual void Serialize(ui::AXNodeData* out_node_data) OVERRIDE;
+
+ private:
+Widget* widget_;
+
+  DISALLOW_COPY_AND_ASSIGN(AXWidgetObjWrapper);
+};
+
+}  // namespace views
+
+#endif  // UI_VIEWS_ACCESSIBILITY_AX_WIDGET_OBJ_WRAPPER_H_