Revive experiment to isolate shell operations.

chrome/browser/chrome_browser_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/browser/chrome_browser_main.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <set>
@@ skipping 1436 matching lines @@
   if (parsed_command_line().HasSwitch(switches::kUninstall)) {
     return DoUninstallTasks(already_running);
   }
 
   if (parsed_command_line().HasSwitch(switches::kHideIcons) ||
       parsed_command_line().HasSwitch(switches::kShowIcons)) {
     return ChromeBrowserMainPartsWin::HandleIconsCommands(
         parsed_command_line_);
   }
 
-  ui::SelectFileDialog::SetFactory(new ChromeSelectFileDialogFactory(
-      BrowserThread::GetTaskRunnerForThread(BrowserThread::IO)));
+  ui::SelectFileDialog::SetFactory(new ChromeSelectFileDialogFactory());
 #endif  // defined(OS_WIN)
 
   if (parsed_command_line().HasSwitch(switches::kMakeDefaultBrowser)) {
     bool is_managed = g_browser_process->local_state()->IsManagedPreference(
         prefs::kDefaultBrowserSettingEnabled);
     if (is_managed && !g_browser_process->local_state()->GetBoolean(
         prefs::kDefaultBrowserSettingEnabled)) {
       return static_cast<int>(chrome::RESULT_CODE_ACTION_DISALLOWED_BY_POLICY);
     }
 
@@ skipping 567 matching lines @@
   chromeos::CrosSettings::Shutdown();
 #endif  // defined(OS_CHROMEOS)
 #endif  // defined(OS_ANDROID)
 }
 
 // Public members:
 
 void ChromeBrowserMainParts::AddParts(ChromeBrowserMainExtraParts* parts) {
   chrome_extra_parts_.push_back(parts);
 }