Add code to initialize accessibility for UI in the ChromeOS startup wizard.

chrome/browser/chromeos/login/wizard_accessibility_helper.cc

+// Copyright (c) 2010 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/chromeos/login/wizard_accessibility_helper.h"
+
+#include "base/logging.h"
+#include "chrome/browser/browser_process.h"
+#include "chrome/browser/extensions/extension_accessibility_api.h"
+#include "chrome/browser/pref_service.h"
+#include "chrome/browser/profile.h"
+#include "chrome/browser/profile_manager.h"
+#include "chrome/common/pref_names.h"
+#include "chrome/common/notification_registrar.h"
+#include "chrome/common/notification_service.h"
+
+// static
+WizardAccessibilityHelper* WizardAccessibilityHelper::GetInstance() {
+  return Singleton<WizardAccessibilityHelper>::get();
+}
+
+WizardAccessibilityHelper::WizardAccessibilityHelper() {
+  accessibility_handler_.reset(new WizardAccessibilityHandler());
+  registrar_.Add(accessibility_handler_.get(),
+                 NotificationType::ACCESSIBILITY_CONTROL_FOCUSED,
+                 NotificationService::AllSources());
+  registrar_.Add(accessibility_handler_.get(),
+                 NotificationType::ACCESSIBILITY_CONTROL_ACTION,
+                 NotificationService::AllSources());
+  registrar_.Add(accessibility_handler_.get(),
+                 NotificationType::ACCESSIBILITY_TEXT_CHANGED,
+                 NotificationService::AllSources());
+  registrar_.Add(accessibility_handler_.get(),
+                 NotificationType::ACCESSIBILITY_MENU_OPENED,
+                 NotificationService::AllSources());
+  registrar_.Add(accessibility_handler_.get(),
+                 NotificationType::ACCESSIBILITY_MENU_CLOSED,
+                 NotificationService::AllSources());
+}
+
+void WizardAccessibilityHelper::MaybeEnableAccessibility(
+    views::View* view_tree, Profile* profile) {
+  if (g_browser_process != NULL &&
+      g_browser_process->local_state()->GetBoolean(
+          prefs::kAccessibilityEnabled)) {
+      EnableAccessibility(view_tree, profile);
+  }
+}
+
+void WizardAccessibilityHelper::EnableAccessibility(
+    views::View* view_tree, Profile* profile) {
+  LOG(INFO) << "Enabling accessibility.";
+  if (g_browser_process != NULL) {
+    PrefService* prefService = g_browser_process->local_state();
+    if (!prefService->GetBoolean(prefs::kAccessibilityEnabled)) {
+      prefService->SetBoolean(prefs::kAccessibilityEnabled, true);
+      prefService->ScheduleSavePersistentPrefs();
+    }
+  }
+  ExtensionAccessibilityEventRouter::GetInstance()->
+      SetAccessibilityEnabled(true);
+  accessible_view_helper_.reset(new AccessibleViewHelper(
+      view_tree, profile));
+}