Add best-effort/allow rollback flags on WorkItem.

chrome/installer/setup/update_active_setup_version_work_item.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/installer/setup/update_active_setup_version_work_item.h"
 
 #include <stdint.h>
 
 #include <vector>
 
@@ skipping 20 matching lines @@
           HKEY_LOCAL_MACHINE,
           active_setup_path,
           WorkItem::kWow64Default,
           L"Version",
           base::Bind(
               &UpdateActiveSetupVersionWorkItem::GetUpdatedActiveSetupVersion,
               base::Unretained(this))),
       operation_(operation) {
 }
 
-bool UpdateActiveSetupVersionWorkItem::Do() {
+bool UpdateActiveSetupVersionWorkItem::DoImpl() {
+  set_reg_value_work_item_.set_best_effort(best_effort());
+  set_reg_value_work_item_.set_rollback_enabled(rollback_enabled());
   return set_reg_value_work_item_.Do();
 }
 
-void UpdateActiveSetupVersionWorkItem::Rollback() {
+void UpdateActiveSetupVersionWorkItem::RollbackImpl() {
   set_reg_value_work_item_.Rollback();
 }
 
 base::string16 UpdateActiveSetupVersionWorkItem::GetUpdatedActiveSetupVersion(
     const base::string16& existing_version) {
   std::vector<base::string16> version_components = base::SplitString(
       existing_version, L",", base::TRIM_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
 
   // If |existing_version| was empty or otherwise corrupted, turn it into a
   // valid one.
   if (version_components.size() != 4U)
     version_components.assign(4U, L"0");
 
   // Unconditionally update the major version.
   version_components[MAJOR] = kActiveSetupMajorVersion;
 
   if (operation_ == UPDATE_AND_BUMP_OS_UPGRADES_COMPONENT) {
     uint32_t previous_value;
     if (!base::StringToUint(version_components[OS_UPGRADES], &previous_value)) {
       LOG(WARNING) << "Couldn't process previous OS_UPGRADES Active Setup "
                       "version component: " << version_components[OS_UPGRADES];
       previous_value = 0;
     }
     version_components[OS_UPGRADES] = base::UintToString16(previous_value + 1);
   }
 
   return base::JoinString(version_components, L",");
 }