Extract locking behaviour from ProcessSingleton.

chrome/browser/chrome_process_singleton.cc

+// Copyright (c) 2013 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_process_singleton.h"
+
+ChromeProcessSingleton::ChromeProcessSingleton(
+    const base::FilePath& user_data_dir,
+    const ProcessSingleton::NotificationCallback& notification_callback)
+    : startup_lock_(notification_callback),
+      modal_dialog_lock_(startup_lock_.AsNotificationCallback()),
+      process_singleton_(user_data_dir,
+                         modal_dialog_lock_.AsNotificationCallback()) {
+}
+
+
+ChromeProcessSingleton::ChromeProcessSingleton(
+      const base::FilePath& user_data_dir,
+      const ProcessSingleton::NotificationCallback& notification_callback,
+      const ProcessSingletonModalDialogLock::SetForegroundWindowHandler&
+          set_foreground_window_handler)
+    : startup_lock_(notification_callback),
+      modal_dialog_lock_(startup_lock_.AsNotificationCallback(),
+                         set_foreground_window_handler),
+      process_singleton_(user_data_dir,
+                         modal_dialog_lock_.AsNotificationCallback()) {
+}
+
+ChromeProcessSingleton::~ChromeProcessSingleton() {
+}
+
+ProcessSingleton::NotifyResult
+    ChromeProcessSingleton::NotifyOtherProcessOrCreate() {
+  return process_singleton_.NotifyOtherProcessOrCreate();
+}
+
+void ChromeProcessSingleton::Cleanup() {
+  process_singleton_.Cleanup();
+}
+
+void ChromeProcessSingleton::SetActiveModalDialog(
+    gfx::NativeWindow active_dialog) {
+  modal_dialog_lock_.SetActiveModalDialog(active_dialog);
+}
+
+void ChromeProcessSingleton::Unlock() {
+  startup_lock_.Unlock();
+}