Add support for GCM subtypes to desktop Instance ID implementation

components/gcm_driver/gcm_desktop_utils.h

 // Copyright 2014 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 COMPONENTS_GCM_DRIVER_GCM_GCM_DESKTOP_UTILS_H_
 #define COMPONENTS_GCM_DRIVER_GCM_GCM_DESKTOP_UTILS_H_
 
 #include <memory>
 
 #include "base/memory/ref_counted.h"
@@ skipping 13 matching lines @@
 
 class GCMDriver;
 class GCMClientFactory;
 
 std::unique_ptr<GCMDriver> CreateGCMDriverDesktop(
     std::unique_ptr<GCMClientFactory> gcm_client_factory,
     PrefService* prefs,
     const base::FilePath& store_path,
     const scoped_refptr<net::URLRequestContextGetter>& request_context,
     version_info::Channel channel,
+    const std::string& category_for_subtypes,
     const scoped_refptr<base::SequencedTaskRunner>& ui_task_runner,
     const scoped_refptr<base::SequencedTaskRunner>& io_task_runner,
     const scoped_refptr<base::SequencedTaskRunner>& blocking_task_runner);
 
 }  // namespace gcm
 
 #endif  // COMPONENTS_GCM_DRIVER_GCM_GCM_DESKTOP_UTILS_H_