Add RESTORE_MODE_DISABLED to RestoreMode

chrome/browser/chromeos/login/screens/device_disabled_screen.cc

Index: chrome/browser/chromeos/login/screens/device_disabled_screen.cc
diff --git a/chrome/browser/chromeos/login/screens/device_disabled_screen.cc b/chrome/browser/chromeos/login/screens/device_disabled_screen.cc
index 8b3141c737bbc001bdf713951d9e01b4a9789530..b5d4e17c6da17f25012aa4c540d1c752cea0e900 100644
--- a/chrome/browser/chromeos/login/screens/device_disabled_screen.cc
+++ b/chrome/browser/chromeos/login/screens/device_disabled_screen.cc
@@ -48,11 +48,12 @@ void DeviceDisabledScreen::Show() {
   if (!actor_ || showing_)
     return;
 
-  bool is_device_disabled = false;
+  std::string restore_mode;
   g_browser_process->local_state()->GetDictionary(
-      prefs::kServerBackedDeviceState)->GetBoolean(policy::kDeviceStateDisabled,
-                                                   &is_device_disabled);
-  if (!is_device_disabled ||
+      prefs::kServerBackedDeviceState)->GetString(
+          policy::kDeviceStateRestoreMode,
+          &restore_mode);
+  if (restore_mode != policy::kDeviceStateRestoreModeDisabled ||

[Mattias Nissler (ping if slow), 2014/10/29 17:41:35]

Hm, now that this is getting checked in more and more places, maybe it's a good
idea to make this easier by introducing a GetRestoreMode function in
server_backed_device_state.h which returns the mode as an enum value?

[bartfab (slow), 2014/10/30 14:10:32]

Done.

       CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kDisableDeviceDisabling)) {
     // Skip the screen if the device is not marked as disabled or device