Avoid useless SYNC_CYCLE_CONTINUATION sync cycle

chrome/browser/sync/engine/verify_updates_command.cc

Index: chrome/browser/sync/engine/verify_updates_command.cc
diff --git a/chrome/browser/sync/engine/verify_updates_command.cc b/chrome/browser/sync/engine/verify_updates_command.cc
index 96dd4e7f310bbb506e8436029a027197333cbbe6..dcf5ecba552ab83971e2372bb0fcfac0804039ac 100644
--- a/chrome/browser/sync/engine/verify_updates_command.cc
+++ b/chrome/browser/sync/engine/verify_updates_command.cc
@@ -42,14 +42,14 @@ std::set<ModelSafeGroup> VerifyUpdatesCommand::GetGroupsToChange(
   return groups_with_updates;
 }
 
-void VerifyUpdatesCommand::ModelChangingExecuteImpl(
+SyncerError VerifyUpdatesCommand::ModelChangingExecuteImpl(
     sessions::SyncSession* session) {
   DVLOG(1) << "Beginning Update Verification";
   ScopedDirLookup dir(session->context()->directory_manager(),
                       session->context()->account_name());
   if (!dir.good()) {
     LOG(ERROR) << "Scoped dir lookup failed!";
-    return;
+    return DIRECTORY_LOOKUP_FAILED;
   }
   WriteTransaction trans(FROM_HERE, SYNCER, dir);
   sessions::StatusController* status = session->mutable_status_controller();
@@ -72,6 +72,8 @@ void VerifyUpdatesCommand::ModelChangingExecuteImpl(
     if (update.deleted())
       status->increment_num_tombstone_updates_downloaded_by(1);
   }
+
+  return NO_ERROR;
 }
 
 namespace {