first-run: Refactor Upgrade class into a common upgrade_util API.

chrome/installer/setup/install_worker.cc

 // Copyright (c) 2011 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 contains the definitions of the installer functions that build
 // the WorkItemList used to install the application.
 
 #include "chrome/installer/setup/install_worker.h"
 
 #include <shlobj.h>
@@ skipping 377 matching lines @@
       if (current_version != NULL) {
         in_use_update_work_items->AddSetRegValueWorkItem(root, version_key,
             google_update::kRegOldVersionField,
             UTF8ToWide(current_version->GetString()), true);
       }
 
       // Adding this registry entry for all products is overkill.
       // However, as it stands, we don't have a way to know which distribution
       // will check the key and run the command, so we add it for all.
       // After the first run, the subsequent runs should just be noops.
-      // (see Upgrade::SwapNewChromeExeIfPresent).
+      // (see upgrade_utils::SwapNewChromeExeIfPresent).
       CommandLine product_rename_cmd(rename);
       products[i]->AppendProductFlags(&product_rename_cmd);
       in_use_update_work_items->AddSetRegValueWorkItem(
           root,
           version_key,
           google_update::kRegRenameCmdField,
           product_rename_cmd.command_line_string(),
           true);
     }
 
     if (current_version != NULL && installer_state.is_multi_install()) {
       BrowserDistribution* dist =
           installer_state.multi_package_binaries_distribution();
       in_use_update_work_items->AddSetRegValueWorkItem(
           root,
           dist->GetVersionKey(),
           google_update::kRegOldVersionField,
           UTF8ToWide(current_version->GetString()),
           true);
       // TODO(tommi): We should move the rename command here. We also need to
-      // update Upgrade::SwapNewChromeExeIfPresent.
+      // update upgrade_utils::SwapNewChromeExeIfPresent.
     }
 
     post_install_task_list->AddWorkItem(in_use_update_work_items.release());
   }
 
   // Append work items that will be executed if this was NOT an in-use update.
   {
     scoped_ptr<WorkItemList> regular_update_work_items(
         WorkItem::CreateConditionalWorkItemList(
             new Not(new ConditionRunIfFileExists(new_chrome_exe))));
@@ skipping 560 matching lines @@
     } else {
       DCHECK(operation == REMOVE_COMMAND);
       work_item_list->AddDeleteRegKeyWorkItem(installer_state.root_key(),
                                               cmd_key)->set_log_message(
           "removing quick-enable-cf command");
     }
   }
 }
 
 }  // namespace installer