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

ui/views/accessibility/ax_widget_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_widget_obj_wrapper.h"
+
+#include "ui/accessibility/ax_node_data.h"
+#include "ui/views/accessibility/ax_node_source_obj_wrapper.h"
+#include "ui/views/accessibility/ax_obj_cache.h"
+#include "ui/views/widget/widget.h"
+
+namespace views {
+
+AXNodeSourceObjWrapper* AXWidgetObjWrapper::GetParent() {
+  // TODO(dtseng): This could possibly hook up to other platforms.
+#ifdef USE_AURA

[dmazzoni, 2014/04/23 05:06:44]

Do we even want to compile this code on any non-Aura platforms? Note that
there's no non-Aura Windows code anymore, but honestly I think we should just
implement this code as Aura-only or possibly even Chrome OS only.

[David Tseng, 2014/04/23 18:20:01]

sgtm; removed.

+  return AXObjCache::GetInstance()->GetOrCreate(widget_->GetNativeView());
+#endif
+  return NULL;
+}
+
+void AXWidgetObjWrapper::GetChildren(
+    std::vector<AXNodeSourceObjWrapper*>* out_children) {
+  out_children->push_back(
+      AXObjCache::GetInstance()->GetOrCreate(widget_->GetRootView()));
+}
+
+void AXWidgetObjWrapper::Serialize(ui::AXNodeData* out_node_data) {
+  out_node_data->id = AXObjCache::GetInstance()->GetID(widget_);
+  out_node_data->role = ui::AX_ROLE_CLIENT;
+  out_node_data->location = widget_->GetWindowBoundsInScreen();
+}
+
+}  // namespace views