ChromeOS: Accept NULL SystemBus in MediaTransferProtocolManager.

device/media_transfer_protocol/media_transfer_protocol_daemon_client.h

Index: device/media_transfer_protocol/media_transfer_protocol_daemon_client.h
diff --git a/device/media_transfer_protocol/media_transfer_protocol_daemon_client.h b/device/media_transfer_protocol/media_transfer_protocol_daemon_client.h
index bba97946f9fbc43b92e53114e833c26270f8ca15..54400e1c67556e8428ca1033d87a54afc6db2dba 100644
--- a/device/media_transfer_protocol/media_transfer_protocol_daemon_client.h
+++ b/device/media_transfer_protocol/media_transfer_protocol_daemon_client.h
@@ -163,9 +163,7 @@ class MediaTransferProtocolDaemonClient {
   virtual void SetUpConnections(const MTPStorageEventHandler& handler) = 0;
 
   // Factory function, creates a new instance and returns ownership.
-  // For normal usage, set |is_stub| to false.
-  static MediaTransferProtocolDaemonClient* Create(dbus::Bus* bus,
-                                                   bool is_stub);
+  static MediaTransferProtocolDaemonClient* Create(dbus::Bus* bus);
 
  protected:
   // Create() should be used instead.