cros: Added policies for screen unlock.

chrome/browser/prefs/browser_prefs.cc

Index: chrome/browser/prefs/browser_prefs.cc
diff --git a/chrome/browser/prefs/browser_prefs.cc b/chrome/browser/prefs/browser_prefs.cc
index f6ac6fb5293300b40775d808445cacbc0966eea9..5c9ddfedc853572a6588f72bc03dfe7b80eec809 100644
--- a/chrome/browser/prefs/browser_prefs.cc
+++ b/chrome/browser/prefs/browser_prefs.cc
@@ -176,6 +176,7 @@
 #include "chrome/browser/chromeos/file_system_provider/registry.h"
 #include "chrome/browser/chromeos/first_run/first_run.h"
 #include "chrome/browser/chromeos/login/quick_unlock/pin_storage.h"
+#include "chrome/browser/chromeos/login/quick_unlock/quick_unlock_utils.h"
 #include "chrome/browser/chromeos/login/saml/saml_offline_signin_limiter.h"
 #include "chrome/browser/chromeos/login/session/user_session_manager.h"
 #include "chrome/browser/chromeos/login/startup_utils.h"
@@ -600,6 +601,7 @@ void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry) {
   chromeos::PinStorage::RegisterProfilePrefs(registry);
   chromeos::Preferences::RegisterProfilePrefs(registry);
   chromeos::PrinterPrefManager::RegisterProfilePrefs(registry);
+  chromeos::RegisterQuickUnlockProfilePrefs(registry);
   chromeos::SAMLOfflineSigninLimiter::RegisterProfilePrefs(registry);
   chromeos::ServicesCustomizationDocument::RegisterProfilePrefs(registry);
   chromeos::UserImageSyncObserver::RegisterProfilePrefs(registry);