Enable ChromeVox on the OOBE screens when using the keyboard shortcut.

chrome/browser/chromeos/login/wizard_accessibility_helper.cc

 // Copyright (c) 2011 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 "base/stl_util.h"
 #include "chrome/browser/browser_process.h"
+#include "chrome/browser/chromeos/accessibility_util.h"
 #include "chrome/browser/extensions/extension_accessibility_api.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/pref_names.h"
 #include "content/common/notification_registrar.h"
 #include "content/common/notification_service.h"
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
@@ skipping 83 matching lines @@
     SetAccessibilityEnabled(true);
   } else {
     SetAccessibilityEnabled(false);
     if (registered_notifications_)
       UnregisterNotifications();
   }
 }
 
 void WizardAccessibilityHelper::SetAccessibilityEnabled(bool enabled) {
   bool doSpeak = (IsAccessibilityEnabled() != enabled);
-  if (g_browser_process) {
-    PrefService* prefService = g_browser_process->local_state();
-    prefService->SetBoolean(prefs::kAccessibilityEnabled, enabled);
-    prefService->ScheduleSavePersistentPrefs();

[dmazzoni, 2011/08/10 05:12:02]

Hey, I noticed that accessibility_util.cc doesn't ever call
ScheduleSavePersistentPrefs - perhaps you should add it there - maybe that
explains why there were circumstances where the pref didn't persist?

-  }
-  ExtensionAccessibilityEventRouter::GetInstance()->
-      SetAccessibilityEnabled(enabled);
+  accessibility::EnableAccessibility(enabled, NULL);
   if (doSpeak) {
     accessibility_handler_->Speak(enabled ?
         l10n_util::GetStringUTF8(IDS_CHROMEOS_ACC_ACCESS_ENABLED).c_str() :
         l10n_util::GetStringUTF8(IDS_CHROMEOS_ACC_ACCESS_DISABLED).c_str(),
         false, true);
   }
 }
 
 }  // namespace chromeos