Add best-effort/allow rollback flags on WorkItem.

chrome/installer/setup/app_launcher_installer.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.
 
 #if defined(GOOGLE_CHROME_BUILD)
 
 #include "chrome/installer/setup/app_launcher_installer.h"
 
 #include "base/strings/string16.h"
 #include "base/version.h"
@@ skipping 27 matching lines @@
 base::string16 GetAppLauncherDisplayName() {
   return GetLocalizedString(IDS_PRODUCT_APP_LAUNCHER_NAME_BASE);
 }
 
 void AddLegacyAppCommandRemovalItem(const InstallerState& installer_state,
                                     const AppRegistrationData& reg_data,
                                     const wchar_t* name,
                                     WorkItemList* list) {
   // Ignore failures since this is a clean-up operation and shouldn't block
   // install or update.
-  list->AddDeleteRegKeyWorkItem(
-                      installer_state.root_key(),
-                      GetRegistrationDataCommandKey(reg_data, name),
-                      KEY_WOW64_32KEY)
-      ->set_ignore_failure(true);
+  auto* delete_reg_key_work_item = list->AddDeleteRegKeyWorkItem(
+      installer_state.root_key(), GetRegistrationDataCommandKey(reg_data, name),
+      KEY_WOW64_32KEY);
+  delete_reg_key_work_item->set_best_effort(true);
+  delete_reg_key_work_item->set_rollback_enabled(false);
 }
 
 }  // namespace
 
 void AddAppLauncherVersionKeyWorkItems(HKEY root,
                                        const base::Version& new_version,
                                        bool add_language_identifier,
                                        WorkItemList* list) {
   DCHECK(!InstallUtil::IsChromeSxSProcess());
   const UpdatingAppRegistrationData app_launcher_reg_data(kAppLauncherGuid);
   AddVersionKeyWorkItems(root,
                          app_launcher_reg_data.GetVersionKey(),
                          GetAppLauncherDisplayName(),
                          new_version,
                          add_language_identifier,
                          list);
 }
 
 void RemoveAppLauncherVersionKey(HKEY reg_root) {
   DCHECK(!InstallUtil::IsChromeSxSProcess());
   const UpdatingAppRegistrationData app_launcher_reg_data(kAppLauncherGuid);
   InstallUtil::DeleteRegistryKey(
       reg_root, app_launcher_reg_data.GetVersionKey(), KEY_WOW64_32KEY);
 }
 
 void AddRemoveLegacyAppHostExeWorkItems(const base::FilePath& target_path,
                                         const base::FilePath& temp_path,
                                         WorkItemList* list) {
   DCHECK(!InstallUtil::IsChromeSxSProcess());
-  list->AddDeleteTreeWorkItem(
-      target_path.Append(kLegacyChromeAppHostExe),
-      temp_path)->set_ignore_failure(true);
+  auto* delete_tree_work_item = list->AddDeleteTreeWorkItem(
+      target_path.Append(kLegacyChromeAppHostExe), temp_path);
+  delete_tree_work_item->set_best_effort(true);
+  delete_tree_work_item->set_rollback_enabled(false);
 }
 
 void AddRemoveLegacyAppCommandsWorkItems(const InstallerState& installer_state,
                                          WorkItemList* list) {
   DCHECK(!InstallUtil::IsChromeSxSProcess());
   DCHECK(list);
   for (const auto* p : installer_state.products()) {
     if (p->is_chrome()) {
       // Remove "install-application" command from App Launcher.
       const UpdatingAppRegistrationData app_launcher_reg_data(kAppLauncherGuid);
@@ skipping 15 matching lines @@
       // Remove "quick-enable-application-host" command from Binaries.
       AddLegacyAppCommandRemovalItem(installer_state, binaries_reg_data,
           kLegacyCmdQuickEnableApplicationHost, list);
     }
   }
 }
 
 }  // namespace installer
 
 #endif  // GOOGLE_CHROME_BUILD