Revert of Flag covering Rollback removed.

chromeos/chromeos_switches.h

Index: chromeos/chromeos_switches.h
diff --git a/chromeos/chromeos_switches.h b/chromeos/chromeos_switches.h
index 20d3625905a75ce69f1431d4aa8c311d9b29cc45..ec0dbf4e858b376ca6e973fd018c040525c6efa0 100644
--- a/chromeos/chromeos_switches.h
+++ b/chromeos/chromeos_switches.h
@@ -35,7 +35,6 @@
 CHROMEOS_EXPORT extern const char kDisableNewChannelSwitcherUI[];
 CHROMEOS_EXPORT extern const char kDisableNewKioskUI[];
 CHROMEOS_EXPORT extern const char kDisableQuickofficeComponentApp[];
-CHROMEOS_EXPORT extern const char kDisableRollbackOption[];
 CHROMEOS_EXPORT extern const char kDisableVolumeAdjustSound[];
 CHROMEOS_EXPORT extern const char kEnableCarrierSwitching[];
 CHROMEOS_EXPORT extern const char kEnableChromeVoxNext[];
@@ -43,6 +42,7 @@
 CHROMEOS_EXPORT extern const char kEnableEmbeddedSignin[];
 CHROMEOS_EXPORT extern const char kEnableExtensionAssetsSharing[];
 CHROMEOS_EXPORT extern const char kEnableFileManagerMTP[];
+CHROMEOS_EXPORT extern const char kEnableRollbackOption[];
 CHROMEOS_EXPORT extern const char kEnableHIDDetectionOnOOBE[];
 CHROMEOS_EXPORT extern const char kEnableKioskMode[];
 CHROMEOS_EXPORT extern const char kEnableNetworkPortalNotification[];