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

ui/views/accessibility/ax_window_obj_wrapper.h

Index: ui/views/accessibility/ax_window_obj_wrapper.h
diff --git a/ui/views/accessibility/ax_window_obj_wrapper.h b/ui/views/accessibility/ax_window_obj_wrapper.h
new file mode 100644
index 0000000000000000000000000000000000000000..b3cd235cfb70a45c196257d2c40587245314948d
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+++ b/ui/views/accessibility/ax_window_obj_wrapper.h
@@ -0,0 +1,42 @@
+// 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_WINDOW_OBJ_WRAPPER_H_
+#define UI_VIEWS_ACCESSIBILITY_AX_WINDOW_OBJ_WRAPPER_H_
+
+#include "ui/aura/window_observer.h"
+#include "ui/views/accessibility/ax_aura_obj_wrapper.h"
+
+namespace aura {
+class Window;
+}  // namespace aura
+
+namespace views {
+
+// Describes a |Window| for use with other AX classes.
+class AXWindowObjWrapper : public AXAuraObjWrapper,
+                           public aura::WindowObserver {
+ public:
+  explicit AXWindowObjWrapper(aura::Window* window);
+  virtual ~AXWindowObjWrapper();
+
+  // AXAuraObjWrapper overrides.
+  virtual AXAuraObjWrapper* GetParent() OVERRIDE;
+  virtual void GetChildren(
+      std::vector<AXAuraObjWrapper*>* out_children) OVERRIDE;
+  virtual void Serialize(ui::AXNodeData* out_node_data) OVERRIDE;
+  virtual int32 GetID() OVERRIDE;
+
+  // WindowObserver overrides.
+  virtual void OnWindowDestroying(aura::Window* window) OVERRIDE;
+
+ private:
+  aura::Window* window_;
+
+  DISALLOW_COPY_AND_ASSIGN(AXWindowObjWrapper);
+};
+
+}  // namespace views
+
+#endif  // UI_VIEWS_ACCESSIBILITY_AX_WINDOW_OBJ_WRAPPER_H_