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

chrome/browser/ui/views/accessibility/ax_root_obj_wrapper.cc

+// 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.
+
+#include "chrome/browser/ui/views/accessibility/ax_root_obj_wrapper.h"
+
+#include "ash/shell.h"
+#include "ui/accessibility/ax_node_data.h"
+#include "ui/accessibility/ax_view_state.h"
+#include "ui/aura/window.h"
+#include "ui/views/accessibility/ax_aura_obj_cache.h"
+
+AXRootObjWrapper::AXRootObjWrapper(int32 id) : id_(id) {
+}
+
+AXRootObjWrapper::~AXRootObjWrapper() {}
+
+bool AXRootObjWrapper::HasChild(views::AXAuraObjWrapper* child) {
+  std::vector<views::AXAuraObjWrapper*> children;
+  GetChildren(&children);
+  return std::find(children.begin(), children.end(), child) != children.end();
+}
+
+views::AXAuraObjWrapper* AXRootObjWrapper::GetParent() {
+  return NULL;
+}
+
+void AXRootObjWrapper::GetChildren(
+    std::vector<views::AXAuraObjWrapper*>* out_children) {
+  aura::Window::Windows children =
+      ash::Shell::GetInstance()->GetAllRootWindows();
+  for (size_t i = 0; i < children.size(); ++i) {
+    out_children->push_back(
+        views::AXAuraObjCache::GetInstance()->GetOrCreate(children[i]));
+  }
+}
+
+void AXRootObjWrapper::Serialize(ui::AXNodeData* out_node_data) {
+  out_node_data->id = id_;
+  out_node_data->role = ui::AX_ROLE_DESKTOP;
+  // TODO(dtseng): Apply a richer set of states.

[dmazzoni, 2014/04/29 17:20:59]

The desktop probably doesn't need any state, right?

+  out_node_data->state = 0;
+}
+
+int32 AXRootObjWrapper::GetID() {
+  return id_;
+}