Revert of Sync: Support multiple setup UIs.

components/sync_driver/sync_service.cc

Index: components/sync_driver/sync_service.cc
diff --git a/components/sync_driver/sync_service.cc b/components/sync_driver/sync_service.cc
index 8b7a88083948af7df45fcba2d3d29d05500eea41..ab73a66a9f6780baef7710a45b6e1733dbb16ac3 100644
--- a/components/sync_driver/sync_service.cc
+++ b/components/sync_driver/sync_service.cc
@@ -9,15 +9,9 @@
 
 namespace sync_driver {
 
-SyncSetupInProgressHandle::SyncSetupInProgressHandle(base::Closure on_destroy)
-    : on_destroy_(on_destroy) {}
-
-SyncSetupInProgressHandle::~SyncSetupInProgressHandle() {
-  on_destroy_.Run();
-}
-
 SyncService::SyncTokenStatus::SyncTokenStatus()
     : connection_status(syncer::CONNECTION_NOT_ATTEMPTED),
       last_get_token_error(GoogleServiceAuthError::AuthErrorNone()) {}
+SyncService::SyncTokenStatus::~SyncTokenStatus() {}
 
-}  // namespace sync_driver
+}