Various changes required to support ChromeVox Next to read Views and Windows.

chrome/browser/ui/ash/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/ash/accessibility/ax_root_obj_wrapper.h"
 
 #include "ash/shell.h"
+#include "base/strings/utf_string_conversions.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) {
+namespace {
+class AlertWindow : public aura::Window {
+ public:
+  AlertWindow() : aura::Window(NULL) {}
+  virtual ~AlertWindow() {}
+};
+
+}  // namespace
+
+AXRootObjWrapper::AXRootObjWrapper(int32 id)
+    : id_(id), alert_window_(new AlertWindow()) {
 }
 
-AXRootObjWrapper::~AXRootObjWrapper() {}
+AXRootObjWrapper::~AXRootObjWrapper() {
+  if (alert_window_) {
+    delete alert_window_;
+    alert_window_ = NULL;
+  }
+}
+
+views::AXAuraObjWrapper* AXRootObjWrapper::GetAlertForText(
+    const std::string& text) {
+  alert_window_->SetTitle(base::UTF8ToUTF16((text)));
+  return views::AXAuraObjCache::GetInstance()->GetOrCreate(alert_window_);
+}
 
 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) {
   if (!ash::Shell::HasInstance())
     return;
 
   // Only on ash is there a notion of a root with 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]));
   }
+
+  out_children->push_back(
+      views::AXAuraObjCache::GetInstance()->GetOrCreate(alert_window_));
 }
 
 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.
   out_node_data->state = 0;
 }
 
 int32 AXRootObjWrapper::GetID() {
   return id_;
 }