Reverting this CL because it was committed before I gave the final LGTM.

chrome/browser/chromeos/login/wizard_controller.cc

 // Copyright (c) 2012 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_controller.h"
 
 #include <signal.h>
 #include <stdlib.h>
 #include <sys/types.h>
 
@@ skipping 392 matching lines @@
   if (local_state->FindPreference(prefs::kSpokenFeedbackEnabled) == NULL) {
     local_state->RegisterBooleanPref(prefs::kSpokenFeedbackEnabled,
                                      false,
                                      PrefService::UNSYNCABLE_PREF);
   }
   if (local_state->FindPreference(prefs::kHighContrastEnabled) == NULL) {
     local_state->RegisterBooleanPref(prefs::kHighContrastEnabled,
                                      false,
                                      PrefService::UNSYNCABLE_PREF);
   }
+  if (local_state->FindPreference(prefs::kScreenMagnifierEnabled) == NULL) {
+    local_state->RegisterBooleanPref(prefs::kScreenMagnifierEnabled,
+                                     false,
+                                     PrefService::UNSYNCABLE_PREF);
+  }
   if (local_state->FindPreference(prefs::kVirtualKeyboardEnabled) == NULL) {
     local_state->RegisterBooleanPref(prefs::kVirtualKeyboardEnabled,
                                      false,
                                      PrefService::UNSYNCABLE_PREF);
   }
   local_state->RegisterBooleanPref(prefs::kOwnerPrimaryMouseButtonRight, false);
   local_state->RegisterBooleanPref(prefs::kOwnerTapToClickEnabled, true);
   local_state->RegisterBooleanPref(prefs::kFactoryResetRequested, false);
 }
 
@@ skipping 410 matching lines @@
   return zero_delay_enabled_;
 }
 
 // static
 void WizardController::SetZeroDelays() {
   kShowDelayMs = 0;
   zero_delay_enabled_ = true;
 }
 
 }  // namespace chromeos