Rollback feature is taken out of the flag.

chromeos/chromeos_switches.cc

Index: chromeos/chromeos_switches.cc
diff --git a/chromeos/chromeos_switches.cc b/chromeos/chromeos_switches.cc
index 26a8d20087602dfb9700e8725a8e2d3988506208..f608db2c05ac14e1d21c9d9b3e459e9436005375 100644
--- a/chromeos/chromeos_switches.cc
+++ b/chromeos/chromeos_switches.cc
@@ -62,6 +62,9 @@ const char kDisableNewKioskUI[] = "disable-new-kiosk-ui";
 const char kDisableOfficeEditingComponentApp[] =
     "disable-office-editing-component-extension";
 
+// Disables rollback option on reset screen.
+const char kDisableRollbackOption[] = "disable-rollback-option";
+
 // Disables volume adjust sound.
 const char kDisableVolumeAdjustSound[] = "disable-volume-adjust-sound";
 
@@ -90,9 +93,6 @@ const char kEnableExtensionAssetsSharing[]  = "enable-extension-assets-sharing";
 const char kEnableNetworkPortalNotification[] =
     "enable-network-portal-notification";
 
-// Enables rollback option on reset screen.
-const char kEnableRollbackOption[] = "enable-rollback-option";
-
 // Enables touchpad three-finger-click as middle button.
 const char kEnableTouchpadThreeFingerClick[]
     = "enable-touchpad-three-finger-click";