[Sync] Refactoring polling to be reliable.

sync/internal_api/sync_rollback_manager_unittest.cc

Index: sync/internal_api/sync_rollback_manager_unittest.cc
diff --git a/sync/internal_api/sync_rollback_manager_unittest.cc b/sync/internal_api/sync_rollback_manager_unittest.cc
index 31ffd14a21d82225b182481683d1c87e7f3cd54d..0b5a6b658e36a3807749fd336a5a25445373b952 100644
--- a/sync/internal_api/sync_rollback_manager_unittest.cc
+++ b/sync/internal_api/sync_rollback_manager_unittest.cc
@@ -202,7 +202,7 @@ TEST_F(SyncRollbackManagerTest, RollbackBasic) {
 
   ModelSafeRoutingInfo routing_info;
   routing_info[PREFERENCES] = GROUP_UI;
-  rollback_manager.StartSyncingNormally(routing_info);
+  rollback_manager.StartSyncingNormally(routing_info, base::Time());
 }
 
 TEST_F(SyncRollbackManagerTest, NoRollbackOfTypesNotBackedUp) {
@@ -226,7 +226,7 @@ TEST_F(SyncRollbackManagerTest, NoRollbackOfTypesNotBackedUp) {
 
   ModelSafeRoutingInfo routing_info;
   routing_info[PREFERENCES] = GROUP_UI;
-  rollback_manager.StartSyncingNormally(routing_info);
+  rollback_manager.StartSyncingNormally(routing_info, base::Time());
 
   // APP entry is still valid.
   EXPECT_TRUE(VerifyEntry(rollback_manager.GetUserShare(), APPS, "app1"));