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

chrome/browser/chromeos/login/wizard_accessibility_handler.h

+// 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.
+
+#ifndef CHROME_BROWSER_CHROMEOS_LOGIN_WIZARD_ACCESSIBILITY_HANDLER_H_
+#define CHROME_BROWSER_CHROMEOS_LOGIN_WIZARD_ACCESSIBILITY_HANDLER_H_
+#pragma once
+
+#include "chrome/common/notification_observer.h"
+#include "chrome/common/notification_source.h"
+#include "chrome/common/notification_type.h"
+
+// Class that handles the accessibility notifications and generates
+// appropriate spoken/audio feedback.
+class WizardAccessibilityHandler : public NotificationObserver {
+ private:
+  // Speaks the specified string.
+  void Speak(const char* speak_str);
+
+  // Override from NotificationObserver.
+  virtual void Observe(NotificationType type,
+                       const NotificationSource& source,
+                       const NotificationDetails& details);
+};
+
+#endif  // CHROME_BROWSER_CHROMEOS_LOGIN_WIZARD_ACCESSIBILITY_HANDLER_H_