Use modemmanager::kModemManager1ServiceName DBus service constant.

chromeos/network/network_sms_handler.cc

 // 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.
 
 #include "chromeos/network/network_sms_handler.h"
 
 #include <algorithm>
 #include <deque>
 #include <string>
 #include <vector>
@@ skipping 453 matching lines @@
     return;
   }
 
   std::string object_path_string;
   if (!properties.GetStringWithoutPathExpansion(
           shill::kDBusObjectProperty, &object_path_string)) {
     LOG(ERROR) << "Device has no DBusObject Property: " << device_path;
     return;
   }
   dbus::ObjectPath object_path(object_path_string);
-  if (service_name == modemmanager::kModemManager1) {
+  if (service_name == modemmanager::kModemManager1ServiceName) {
     device_handlers_.push_back(
         new ModemManager1NetworkSmsDeviceHandler(
             this, service_name, object_path));
   } else {
     device_handlers_.push_back(
         new ModemManagerNetworkSmsDeviceHandler(
             this, service_name, object_path));
   }
 }
 
 }  // namespace chromeos