Add best-effort/allow rollback flags on WorkItem.

chrome/installer/util/create_dir_work_item.cc

 // Copyright (c) 2010 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 "base/files/file_util.h"
 #include "base/logging.h"
 #include "chrome/installer/util/create_dir_work_item.h"
 #include "chrome/installer/util/logging_installer.h"
 
 CreateDirWorkItem::~CreateDirWorkItem() {
@@ skipping 11 matching lines @@
   }
 
   base::FilePath parent_dir(path_);
   do {
     top_path_ = parent_dir;
     parent_dir = parent_dir.DirName();
   } while ((parent_dir != top_path_) && !base::PathExists(parent_dir));
   return;
 }
 
-bool CreateDirWorkItem::Do() {
+bool CreateDirWorkItem::DoImpl() {
   VLOG(1) << "creating directory " << path_.value();
   GetTopDirToCreate();
   if (top_path_.empty())
     return true;
 
   VLOG(1) << "top directory that needs to be created: " << top_path_.value();
   bool result = base::CreateDirectory(path_);
   VLOG(1) << "directory creation result: " << result;
 
   rollback_needed_ = true;
 
   return result;
 }
 
-void CreateDirWorkItem::Rollback() {
+void CreateDirWorkItem::RollbackImpl() {
   if (!rollback_needed_)
     return;
 
   // Delete all the directories we created to rollback.
   // Note we can not recusively delete top_path_ since we don't want to
   // delete non-empty directory. (We may have created a shared directory).
   // Instead we walk through path_ to top_path_ and delete directories
   // along the way.
   base::FilePath path_to_delete(path_);
 
   while (1) {
     if (base::PathExists(path_to_delete)) {
       if (!RemoveDirectory(path_to_delete.value().c_str()))
         break;
     }
     if (path_to_delete == top_path_)
       break;
     path_to_delete = path_to_delete.DirName();
   }
 
   return;
 }