[Bootstrapping] Introduce an accelerator to put a ChromeOS device into Slave OOBE process.

chrome/browser/chromeos/login/startup_utils.cc

Index: chrome/browser/chromeos/login/startup_utils.cc
diff --git a/chrome/browser/chromeos/login/startup_utils.cc b/chrome/browser/chromeos/login/startup_utils.cc
index 5f9a76cea2bcbde4db5644d2ef5d8f50909b92c6..fa94812b59739398bfac4dfd70e91fe23ac63708 100644
--- a/chrome/browser/chromeos/login/startup_utils.cc
+++ b/chrome/browser/chromeos/login/startup_utils.cc
@@ -88,6 +88,7 @@ void StartupUtils::RegisterPrefs(PrefRegistrySimple* registry) {
   registry->RegisterIntegerPref(prefs::kDeviceRegistered, -1);
   registry->RegisterBooleanPref(prefs::kEnrollmentRecoveryRequired, false);
   registry->RegisterStringPref(prefs::kInitialLocale, "en-US");
+  registry->RegisterStringPref(prefs::kOobeBootstrappingRole, "");
   registry->RegisterBooleanPref(prefs::kOobeControllerDetected, false);
 }
 
@@ -114,6 +115,8 @@ void StartupUtils::MarkOobeCompleted() {
   g_browser_process->local_state()->ClearPref(prefs::kOobeScreenPending);
   SaveBoolPreferenceForced(prefs::kOobeComplete, true);
 
+  g_browser_process->local_state()->ClearPref(prefs::kOobeBootstrappingRole);
+
   // Successful enrollment implies that recovery is not required.
   SaveBoolPreferenceForced(prefs::kEnrollmentRecoveryRequired, false);
 }