Add WOW64 support to the installer registry work items

chrome/installer/setup/setup_main.cc

 // 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.
 
 #include "chrome/installer/setup/setup_main.h"
 
 #include <windows.h>
 #include <msi.h>
 #include <shellapi.h>
 #include <shlobj.h>
@@ skipping 246 matching lines @@
 
   // Add work items to delete the "opv", "cpv", and "cmd" values from all
   // products we're operating on (which including the multi-install binaries).
   const Products& products = installer_state->products();
   HKEY reg_root = installer_state->root_key();
   base::string16 version_key;
   for (Products::const_iterator it = products.begin(); it < products.end();
        ++it) {
     version_key = (*it)->distribution()->GetVersionKey();
     install_list->AddDeleteRegValueWorkItem(
-        reg_root, version_key, google_update::kRegOldVersionField);
+        reg_root, version_key, WorkItem::kWow64Default,
+        google_update::kRegOldVersionField);
     install_list->AddDeleteRegValueWorkItem(
-        reg_root, version_key, google_update::kRegCriticalVersionField);
+        reg_root, version_key, WorkItem::kWow64Default,
+        google_update::kRegCriticalVersionField);
     install_list->AddDeleteRegValueWorkItem(
-        reg_root, version_key, google_update::kRegRenameCmdField);
+        reg_root, version_key, WorkItem::kWow64Default,
+        google_update::kRegRenameCmdField);
   }
   installer::InstallStatus ret = installer::RENAME_SUCCESSFUL;
   if (!install_list->Do()) {
     LOG(ERROR) << "Renaming of executables failed. Rolling back any changes.";
     install_list->Rollback();
     ret = installer::RENAME_FAILED;
   }
   // temp_path's dtor will take care of deleting or scheduling itself for
   // deletion at reboot when this scope closes.
   VLOG(1) << "Deleting temporary directory " << temp_path.path().value();
@@ skipping 1553 matching lines @@
     // Note that we allow the status installer::UNINSTALL_REQUIRES_REBOOT
     // to pass through, since this is only returned on uninstall which is
     // never invoked directly by Google Update.
     return_code = InstallUtil::GetInstallReturnCode(install_status);
   }
 
   VLOG(1) << "Installation complete, returning: " << return_code;
 
   return return_code;
 }