Move DBusClient stub implementations into separate files.

chromeos/dbus/modem_messaging_client.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_MODEM_MESSAGING_CLIENT_H_
 #define CHROMEOS_DBUS_MODEM_MESSAGING_CLIENT_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 18 matching lines @@
   typedef base::Callback<void()> DeleteCallback;
   typedef base::Callback<void(const dbus::ObjectPath& message_path,
                               bool complete)> SmsReceivedHandler;
   typedef base::Callback<void(const std::vector<dbus::ObjectPath>& paths)>
       ListCallback;
 
   virtual ~ModemMessagingClient();
 
   // Factory function, creates a new instance and returns ownership.
   // For normal usage, access the singleton via DBusThreadManager::Get().
-  static ModemMessagingClient* Create(DBusClientImplementationType type);
+  static ModemMessagingClient* Create();
 
   // Sets SmsReceived signal handler.
   virtual void SetSmsReceivedHandler(const std::string& service_name,
                                      const dbus::ObjectPath& object_path,
                                      const SmsReceivedHandler& handler) = 0;
 
   // Resets SmsReceived signal handler.
   virtual void ResetSmsReceivedHandler(const std::string& service_name,
                                        const dbus::ObjectPath& object_path) = 0;
 
@@ skipping 14 matching lines @@
   // Create() should be used instead.
   ModemMessagingClient();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ModemMessagingClient);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_DBUS_MODEM_MESSAGING_CLIENT_H_