[sync] "TwoClientBookmarksSyncTest.Sanity" is flaky

components/sync/driver/glue/sync_backend_host_impl.cc

Index: components/sync/driver/glue/sync_backend_host_impl.cc
diff --git a/components/sync/driver/glue/sync_backend_host_impl.cc b/components/sync/driver/glue/sync_backend_host_impl.cc
index 988b00b66ca6aba7ed1e0a54675d7b439b919653..a86f7b70f708662f52edf322da6f60c857a3d80a 100644
--- a/components/sync/driver/glue/sync_backend_host_impl.cc
+++ b/components/sync/driver/glue/sync_backend_host_impl.cc
@@ -111,6 +111,10 @@ void SyncBackendHostImpl::Initialize(
     factory_switches.pre_commit_updates_policy =
         EngineComponentsFactory::FORCE_ENABLE_PRE_COMMIT_UPDATE_AVOIDANCE;
   }
+  if (cl->HasSwitch(switches::kSyncShortNudgeDelayForTest)) {
+    factory_switches.nudge_delay =
+        EngineComponentsFactory::NudgeDelay::SHORT_NUDGE_DELAY;
+  }
 
   std::map<ModelType, int64_t> invalidation_versions;
   sync_prefs_->GetInvalidationVersions(&invalidation_versions);