Minor clean up in DBusClient, DBusThreadManager, and FakeDBusThreadManager code.

chromeos/dbus/dbus_thread_manager.h

 // 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.
 
 #ifndef CHROMEOS_DBUS_DBUS_THREAD_MANAGER_H_
 #define CHROMEOS_DBUS_DBUS_THREAD_MANAGER_H_
 
-#include <string>
-
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "chromeos/chromeos_export.h"
 
 namespace base {
 class Thread;
-};
+}  // namespace base
 
 namespace dbus {
 class Bus;
 class ObjectPath;
-};
+}  // namespace dbus
 
 namespace chromeos {
 
 class DBusThreadManagerObserver;
 
 // Style Note: Clients are sorted by names.
 class BluetoothAdapterClient;
 class BluetoothAgentManagerClient;
 class BluetoothDeviceClient;
 class BluetoothGattCharacteristicClient;
@@ skipping 143 matching lines @@
 
   // Initializes |client| with the |system_bus_|.
   static void InitClient(DBusClient* client);
 
   DISALLOW_COPY_AND_ASSIGN(DBusThreadManager);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_DBUS_DBUS_THREAD_MANAGER_H_