Add best-effort/allow rollback flags on WorkItem.

chrome/installer/util/install_util.h

 // Copyright (c) 2012 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.
 //
 // This file declares utility functions for the installer. The original reason
 // for putting these functions in installer\util library is so that we can
 // separate out the critical logic and write unit tests for it.
 
 #ifndef CHROME_INSTALLER_UTIL_INSTALL_UTIL_H_
 #define CHROME_INSTALLER_UTIL_INSTALL_UTIL_H_
@@ skipping 54 matching lines @@
   // important security fix.
   // system_install: if true, looks for version number under the HKLM root,
   //                 otherwise looks under the HKCU.
   static void GetCriticalUpdateVersion(BrowserDistribution* dist,
                                        bool system_install,
                                        base::Version* version);
 
   // This function checks if the current OS is supported for Chromium.
   static bool IsOSSupported();
 
-  // Adds work items to |install_list|, which should be a
-  // NoRollbackWorkItemList, to set installer error information in the registry
-  // for consumption by Google Update.  |state_key| must be the full path to an
+  // Adds work items to |install_list| to set installer error information in the
+  // registry for consumption by Google Update. |install_list| must be best-
+  // effort with rollback disabled. |state_key| must be the full path to an
   // app's ClientState key.  See InstallerState::WriteInstallerResult for more
   // details.
   static void AddInstallerResultItems(bool system_install,
                                       const base::string16& state_key,
                                       installer::InstallStatus status,
                                       int string_resource_id,
                                       const base::string16* const launch_cmd,
                                       WorkItemList* install_list);
 
   // Update the installer stage reported by Google Update.  |state_key_path|
@@ skipping 134 matching lines @@
    private:
     DISALLOW_COPY_AND_ASSIGN(ProgramCompare);
   };  // class ProgramCompare
 
  private:
   DISALLOW_COPY_AND_ASSIGN(InstallUtil);
 };
 
 
 #endif  // CHROME_INSTALLER_UTIL_INSTALL_UTIL_H_