Add support for GCM subtypes to desktop Instance ID implementation

chrome/common/pref_names.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 "chrome/common/pref_names.h"
 
 #include "base/macros.h"
 #include "build/build_config.h"
 #include "chrome/common/pref_font_webkit_names.h"
 
@@ skipping 1215 matching lines @@
     "gpu_driver_info_build_finder_print";
 #endif
 
 // Maps from app ids to origin + Service Worker registration ID.
 const char kPushMessagingAppIdentifierMap[] =
     "gcm.push_messaging_application_id_map";
 
 // Maps from origin to background budget information.
 const char kBackgroundBudgetMap[] = "push_messaging.background_budget_map";
 
+// A string like "com.chrome.macosx" that should be used as the GCM category
+// when an app_id is sent as a subtype instead of as a category.
+const char kGCMProductCategoryForSubtypes[] =
+    "gcm.product_category_for_subtypes";
+
 // Whether a user is allowed to use Easy Unlock.
 const char kEasyUnlockAllowed[] = "easy_unlock.allowed";
 
 // Whether Easy Unlock is enabled.
 const char kEasyUnlockEnabled[] = "easy_unlock.enabled";
 
 // Preference storing Easy Unlock pairing data.
 const char kEasyUnlockPairing[] = "easy_unlock.pairing";
 
 // Whether close proximity between the remote and the local device is required
@@ skipping 1014 matching lines @@
 #endif  // defined(ENABLE_MEDIA_ROUTER)
 
 // The base64-encoded representation of the public key to use to validate origin
 // trial token signatures.
 const char kOriginTrialPublicKey[] = "origin_trials.public_key";
 
 // A list of origin trial features to disable by policy.
 const char kOriginTrialDisabledFeatures[] = "origin_trials.disabled_features";
 
 }  // namespace prefs