[USS] Covert kSyncEnableUSSDeviceInfo commandline flag to Feature API

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 69273938e906e370fd20809e0e2f26815ee3ee56..7a547be5e27d6b779bd9a465b309a5026f0090cb 100644
--- a/components/sync/driver/sync_driver_switches.cc
+++ b/components/sync/driver/sync_driver_switches.cc
@@ -34,4 +34,8 @@ const char kSyncShortInitialRetryOverride[] =
 const base::Feature kSyncClearDataOnPassphraseEncryption{
     "ClearSyncDataOnPassphraseEncryption", base::FEATURE_DISABLED_BY_DEFAULT};
 
+// Enables USS on Device Info.
+const base::Feature kSyncUSSDeviceInfo{"EnableSyncUSSDeviceInfo",
+                                       base::FEATURE_DISABLED_BY_DEFAULT};
+
 }  // namespace switches