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

chrome/browser/chromeos/login/wizard_accessibility_handler.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_handler.h"
+
+#include "chrome/browser/accessibility_events.h"
+#include "chrome/browser/chromeos/cros/cros_library.h"
+#include "chrome/browser/chromeos/cros/speech_synthesis_library.h"
+#include "chrome/common/notification_service.h"
+
+void WizardAccessibilityHandler::Observe(
+    NotificationType type,
+    const NotificationSource& source,
+    const NotificationDetails& details) {
+  const AccessibilityControlInfo *info = NULL;
+  info = Details<const AccessibilityControlInfo>(details).ptr();
+  switch (type.value) {
+    case NotificationType::ACCESSIBILITY_CONTROL_FOCUSED:
+      Speak(info->name().c_str());
+      break;
+    case NotificationType::ACCESSIBILITY_CONTROL_ACTION:
+      break;
+    case NotificationType::ACCESSIBILITY_TEXT_CHANGED:
+      break;
+    case NotificationType::ACCESSIBILITY_MENU_OPENED:
+      break;
+    case NotificationType::ACCESSIBILITY_MENU_CLOSED:
+      break;
+    default:
+      NOTREACHED() << "Cannot recognize notification type: " << type.value;
+      break;
+  }
+}
+
+void WizardAccessibilityHandler::Speak(const char* speak_str) {
+  if (chromeos::CrosLibrary::Get()->EnsureLoaded()) {
+    chromeos::CrosLibrary::Get()->GetSpeechSynthesisLibrary()->
+        StopSpeaking();
+    chromeos::CrosLibrary::Get()->GetSpeechSynthesisLibrary()->
+        Speak(speak_str);
+  }
+}