[sync] skeleton implementation of AutocompleteSyncBridge

components/sync/driver/sync_driver_switches.cc

Index: components/sync/driver/sync_driver_switches.cc
diff --git a/components/sync/driver/sync_driver_switches.cc b/components/sync/driver/sync_driver_switches.cc
index 6f446ecbd7c16c750166a1d485b591fb5e7d5468..e2c08a990419bc1711cf4ada5de3523334ca7e5a 100644
--- a/components/sync/driver/sync_driver_switches.cc
+++ b/components/sync/driver/sync_driver_switches.cc
@@ -37,9 +37,13 @@ const base::Feature kSyncClearDataOnPassphraseEncryption{
     "ClearSyncDataOnPassphraseEncryption", base::FEATURE_DISABLED_BY_DEFAULT};
 
 // Enables USS implementation of DeviceInfo datatype. This flag controls whether
-// SyncableService based or ModelTypeService based implementation is used for
+// SyncableService based or ModelTypeSyncBridge based implementation is used for
 // DeviceInfo type.
 const base::Feature kSyncUSSDeviceInfo{"EnableSyncUSSDeviceInfo",
                                        base::FEATURE_DISABLED_BY_DEFAULT};
 
+// Enables USS implementation of Autocomplete datatype.
+const base::Feature kSyncUSSAutocomplete{"SyncUSSAutocomplete",
+                                         base::FEATURE_DISABLED_BY_DEFAULT};
+
 }  // namespace switches