Remove PrefServiceSimple, replacing it with PrefService and PrefRegistrySimple.

chrome/browser/chromeos/login/wizard_controller.cc

Index: chrome/browser/chromeos/login/wizard_controller.cc
diff --git a/chrome/browser/chromeos/login/wizard_controller.cc b/chrome/browser/chromeos/login/wizard_controller.cc
index a14b2620daf486759934e0e473e2e12ebee6713b..b683c7169a62c46a8e169f25902514253eead5f8 100644
--- a/chrome/browser/chromeos/login/wizard_controller.cc
+++ b/chrome/browser/chromeos/login/wizard_controller.cc
@@ -385,22 +385,14 @@ void WizardController::SkipUpdateEnrollAfterEula() {
 }
 
 // static
-void WizardController::RegisterPrefs(PrefServiceSimple* local_state) {
+void WizardController::RegisterPrefs(PrefRegistrarSimple* local_state) {
   local_state->RegisterBooleanPref(kOobeComplete, false);
   local_state->RegisterIntegerPref(kDeviceRegistered, -1);
   local_state->RegisterBooleanPref(kEulaAccepted, false);
   local_state->RegisterStringPref(kInitialLocale, "en-US");
-  // Check if the pref is already registered in case
-  // Preferences::RegisterUserPrefs runs before this code in the future.
-  if (local_state->FindPreference(prefs::kSpokenFeedbackEnabled) == NULL) {
-    local_state->RegisterBooleanPref(prefs::kSpokenFeedbackEnabled, false);
-  }
-  if (local_state->FindPreference(prefs::kHighContrastEnabled) == NULL) {
-    local_state->RegisterBooleanPref(prefs::kHighContrastEnabled, false);
-  }
-  if (local_state->FindPreference(prefs::kVirtualKeyboardEnabled) == NULL) {
-    local_state->RegisterBooleanPref(prefs::kVirtualKeyboardEnabled, false);
-  }
+  local_state->RegisterBooleanPref(prefs::kSpokenFeedbackEnabled, false);
+  local_state->RegisterBooleanPref(prefs::kHighContrastEnabled, false);
+  local_state->RegisterBooleanPref(prefs::kVirtualKeyboardEnabled, false);
   local_state->RegisterBooleanPref(prefs::kOwnerPrimaryMouseButtonRight, false);
   local_state->RegisterBooleanPref(prefs::kOwnerTapToClickEnabled, true);
   local_state->RegisterBooleanPref(prefs::kFactoryResetRequested, false);