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

ui/views/accessibility/ax_window_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 "ui/views/accessibility/ax_window_obj_wrapper.h"
+
+#include "base/strings/utf_string_conversions.h"
+#include "ui/accessibility/ax_node_data.h"
+#include "ui/aura/window.h"
+#include "ui/views/accessibility/ax_aura_obj_cache.h"
+#include "ui/views/widget/widget.h"
+
+namespace views {
+
+AXWindowObjWrapper::AXWindowObjWrapper(
+    aura::Window* window) : window_(window) {
+  window->AddObserver(this);
+}
+
+AXWindowObjWrapper::~AXWindowObjWrapper() {
+  window_->RemoveObserver(this);
+  window_ = NULL;
+}
+
+AXAuraObjWrapper* AXWindowObjWrapper::GetParent() {
+  if (!window_->parent())
+    return NULL;
+
+  return AXAuraObjCache::GetInstance()->GetOrCreate(window_->parent());
+}
+
+void AXWindowObjWrapper::GetChildren(
+    std::vector<AXAuraObjWrapper*>* out_children) {
+  aura::Window::Windows children = window_->children();
+  for (size_t i = 0; i < children.size(); ++i) {
+    out_children->push_back(
+        AXAuraObjCache::GetInstance()->GetOrCreate(children[i]));
+  }
+
+  // Also consider any associated widgets as children.
+  Widget* widget = Widget::GetWidgetForNativeView(window_);
+  if (widget)
+    out_children->push_back(AXAuraObjCache::GetInstance()->GetOrCreate(widget));
+}
+
+void AXWindowObjWrapper::Serialize(ui::AXNodeData* out_node_data) {
+  out_node_data->id = GetID();
+  out_node_data->role = ui::AX_ROLE_WINDOW;
+  // TODO(dtseng): Set better states.
+  out_node_data->state = 0;
+  out_node_data->location = window_->bounds();
+  out_node_data->AddStringAttribute(
+      ui::AX_ATTR_NAME, base::UTF16ToUTF8(window_->title()));
+}
+
+int32 AXWindowObjWrapper::GetID() {
+  return AXAuraObjCache::GetInstance()->GetID(window_);
+}
+
+void AXWindowObjWrapper::OnWindowDestroying(aura::Window* window) {
+  AXAuraObjCache::GetInstance()->Remove(window);
+}
+
+}  // namespace views