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"
 #include "base/sequenced_task_runner.h"
 #include "components/version_info/version_info.h"
 
 class PrefService;
 namespace base {
 class FilePath;
 }
 
 namespace net {
 class URLRequestContextGetter;
 }
 
+namespace user_prefs {
+class PrefRegistrySyncable;
+}
+
 namespace gcm {
 
 class GCMDriver;
 class GCMClientFactory;
 
+void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
+
 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,
+    const std::string& product_shortname,
     version_info::Channel channel,
     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_