Revert of Add best-effort/allow rollback flags on WorkItem.

chrome/installer/setup/update_active_setup_version_work_item.cc

Index: chrome/installer/setup/update_active_setup_version_work_item.cc
diff --git a/chrome/installer/setup/update_active_setup_version_work_item.cc b/chrome/installer/setup/update_active_setup_version_work_item.cc
index 50761eecb9de2c3bb078c5ce8d2a34da3ea19428..7372675a6fe013ac72632f24f30df1dfb54cb1b4 100644
--- a/chrome/installer/setup/update_active_setup_version_work_item.cc
+++ b/chrome/installer/setup/update_active_setup_version_work_item.cc
@@ -38,13 +38,11 @@
       operation_(operation) {
 }
 
-bool UpdateActiveSetupVersionWorkItem::DoImpl() {
-  set_reg_value_work_item_.set_best_effort(best_effort());
-  set_reg_value_work_item_.set_rollback_enabled(rollback_enabled());
+bool UpdateActiveSetupVersionWorkItem::Do() {
   return set_reg_value_work_item_.Do();
 }
 
-void UpdateActiveSetupVersionWorkItem::RollbackImpl() {
+void UpdateActiveSetupVersionWorkItem::Rollback() {
   set_reg_value_work_item_.Rollback();
 }