mash: Allow a subset of D-Bus clients to be created in DBusThreadManager

chrome/browser/chromeos/dbus_thread_manager_chrome.h

+// Copyright 2016 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.
+
+#ifndef CHROME_BROWSER_CHROMEOS_DBUS_THREAD_MANAGER_CHROME_H_
+#define CHROME_BROWSER_CHROMEOS_DBUS_THREAD_MANAGER_CHROME_H_
+
+#include "base/macros.h"
+
+//JAMES namespace chromeos for everything?
+
+namespace chromeos {
+class DebugDaemonClient;
+class SystemClockClient;
+}
+
+class DBusThreadManagerChrome {
+ public:
+  static DBusThreadManagerChrome* Get();
+
+  //JAMES external ownership? or traditional singleton like DBusThreadManager?
+  DBusThreadManagerChrome();
+  ~DBusThreadManagerChrome();
+
+  // D-Bus clients available to chrome.
+  chromeos::DebugDaemonClient* GetDebugDaemonClient();
+  chromeos::SystemClockClient* GetSystemClockClient();
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(DBusThreadManagerChrome);
+};
+
+#endif  // CHROME_BROWSER_CHROMEOS_DBUS_THREAD_MANAGER_CHROME_H_