Add support for GCM subtypes to desktop Instance ID implementation

chrome/browser/services/gcm/gcm_product_util.h

Index: chrome/browser/services/gcm/gcm_product_util.h
diff --git a/chrome/browser/services/gcm/gcm_product_util.h b/chrome/browser/services/gcm/gcm_product_util.h
new file mode 100644
index 0000000000000000000000000000000000000000..e5f80e8a1fb30962b50510a478722b9b94a7cb92
--- /dev/null
+++ b/chrome/browser/services/gcm/gcm_product_util.h
@@ -0,0 +1,24 @@
+// Copyright 2016 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 CHROME_BROWSER_SERVICES_GCM_GCM_PRODUCT_UTIL_H_
+#define CHROME_BROWSER_SERVICES_GCM_GCM_PRODUCT_UTIL_H_
+
+#include <string>
+
+class PrefService;
+
+namespace user_prefs {
+class PrefRegistrySyncable;
+}
+
+namespace gcm {
+
+std::string CategoryForSubtypes(PrefService* prefs);

[Peter Beverloo, 2016/07/28 12:34:09]

nit: document the method here, not in the implementation file

[johnme, 2016/08/04 17:47:14]

Done.

+
+void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
+
+}  // namespace gcm
+
+#endif  // CHROME_BROWSER_SERVICES_GCM_GCM_PRODUCT_UTIL_H_