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..cc6ab4bec4b9a10e116208a54ed6903c35f793fb
--- /dev/null
+++ b/chrome/browser/background_mode_manager_mac.mm
@@ -0,0 +1,78 @@
+// 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 "app/l10n_util.h"
+#include "base/command_line.h"
+#include "base/mac_util.h"
+#include "chrome/browser/background_mode_manager.h"
+#include "chrome/browser/browser_thread.h"
+#include "chrome/common/app_mode_common_mac.h"
+#include "chrome/common/chrome_switches.h"
+#include "grit/generated_resources.h"
+
+namespace {
+
+class DisableLaunchOnStartupTask : public Task {
+ public:
+  virtual void Run();
+};
+
+class EnableLaunchOnStartupTask : public Task {
+ public:
+  virtual void Run();
+};
+
+const CFStringRef kLaunchOnStartupResetAllowedPrefsKey =
+    CFSTR("LaunchOnStartupResetAllowed");
+
+void DisableLaunchOnStartupTask::Run() {
+  Boolean key_exists_and_has_valid_format;  // ignored
+  if (!CFPreferencesGetAppBooleanValue(kLaunchOnStartupResetAllowedPrefsKey,
+                                       app_mode::kAppPrefsID,
+                                       &key_exists_and_has_valid_format))
+    return;
+
+  CFPreferencesSetAppValue(kLaunchOnStartupResetAllowedPrefsKey,
+                           kCFBooleanFalse,
+                           app_mode::kAppPrefsID);
+
+  // 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 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.
+  CFPreferencesSetAppValue(kLaunchOnStartupResetAllowedPrefsKey,
+                           kCFBooleanTrue,
+                           app_mode::kAppPrefsID);
+}
+
+}  // namespace
+
+void BackgroundModeManager::EnableLaunchOnStartup(bool should_launch) {
+  // This functionality is only defined for default profile, currently.
+  if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kUserDataDir))
+    return;
+
+  if (should_launch) {
+    BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE,
+                            new EnableLaunchOnStartupTask());
+  } else {
+    BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE,
+                            new DisableLaunchOnStartupTask());
+  }
+}
+
+string16 BackgroundModeManager::GetPreferencesMenuLabel() {
+  return l10n_util::GetStringUTF16(IDS_OPTIONS);
+}