Move Mac LaunchOnStartup enable/disable to File thread

chrome/browser/background_mode_manager_mac.mm

Index: chrome/browser/background_mode_manager_mac.mm
diff --git a/chrome/browser/background_mode_manager_mac.mm b/chrome/browser/background_mode_manager_mac.mm
new file mode 100644
index 0000000000000000000000000000000000000000..e8b5c3c004f2f05e6863fb515e3808cd5fb877ae
--- /dev/null
+++ b/chrome/browser/background_mode_manager_mac.mm
@@ -0,0 +1,39 @@
+// 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 "chrome/app/chrome_command_ids.h"
+#include "chrome/browser/background_mode_manager.h"
+#include "grit/generated_resources.h"
+
+#include "base/mac_util.h"
+
+void BackgroundModeManager::DisableLaunchOnStartupTask::Run() {
+  // If we didn't set Login Item, don't mess with it.
+  if (!manager_->IsLaunchOnStartupResetAllowed())

[Andrew T Wilson (Slow), 2010/12/03 02:06:59]

See my previous notes - I don't think we can make these calls from the FILE
thread.

[The wrong rickcam account, 2010/12/04 02:08:04]

Done.  I've switched to use the family of routines that Dmitry suggested.

+    return;
+  manager_->SetLaunchOnStartupResetAllowed(false);
+
+  // Check if Chrome is not a login Item, or is a Login Item but w/o 'hidden'
+  // flag - most likely user has modified the setting, don't override it.
+  bool is_hidden = false;
+  if (!mac_util::CheckLoginItemStatus(&is_hidden) || !is_hidden)
+    return;
+
+  mac_util::RemoveFromLoginItems();
+}
+
+void BackgroundModeManager::EnableLaunchOnStartupTask::Run() {
+  // Return if Chrome is already a Login Item (avoid overriding user choice).
+  if (mac_util::CheckLoginItemStatus(NULL))
+    return;
+
+  mac_util::AddToLoginItems(true);  // Hide on startup.
+
+  // Remember we set Login Item, not the user - so we can reset it later.
+  manager_->SetLaunchOnStartupResetAllowed(true);
+}
+
+void BackgroundModeManager::AddPreferencesItem(menus::SimpleMenuModel* menu) {
+  menu->AddItemWithStringId(IDC_OPTIONS, IDS_OPTIONS);
+}