[sync] "TwoClientBookmarksSyncTest.Sanity" is flaky

components/sync/engine/engine_components_factory.h

Index: components/sync/engine/engine_components_factory.h
diff --git a/components/sync/engine/engine_components_factory.h b/components/sync/engine/engine_components_factory.h
index 175af5cf37af4426b50ed405153a02befd3cf576..fb80d0317af0b7521ebd708535dda8ecc6f4e2e7 100644
--- a/components/sync/engine/engine_components_factory.h
+++ b/components/sync/engine/engine_components_factory.h
@@ -56,6 +56,11 @@ class EngineComponentsFactory {
     FORCE_ENABLE_PRE_COMMIT_UPDATE_AVOIDANCE,
   };
 
+  enum class NudgeDelay {
+    DEFAULT_NUDGE_DELAY,
+    SHORT_NUDGE_DELAY,
+  };
+
   // Configuration options for internal components. This struct is expected
   // to grow and shrink over time with transient features / experiments,
   // roughly following command line flags in chrome. Implementations of
@@ -64,6 +69,7 @@ class EngineComponentsFactory {
   struct Switches {
     EncryptionMethod encryption_method;
     BackoffOverride backoff_override;
+    NudgeDelay nudge_delay;
     PreCommitUpdatesPolicy pre_commit_updates_policy;
   };