Clean up a few more unused globals.

chrome/browser/web_resource/promo_resource_service.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/browser/web_resource/promo_resource_service.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/message_loop/message_loop.h"
 #include "base/prefs/pref_registry_simple.h"
@@ skipping 12 matching lines @@
 namespace {
 
 // Delay on first fetch so we don't interfere with startup.
 const int kStartResourceFetchDelay = 5000;
 
 // Delay between calls to fetch the promo json: 6 hours in production, and 3 min
 // in debug.
 const int kCacheUpdateDelay = 6 * 60 * 60 * 1000;
 const int kTestCacheUpdateDelay = 3 * 60 * 1000;
 
-// The version of the service (used to expire the cache when upgrading Chrome
-// to versions with different types of promos).
-const int kPromoServiceVersion = 7;
-
 // The promotion type used for Unpack() and ScheduleNotificationOnInit().
 const NotificationPromo::PromoType kValidPromoTypes[] = {
 #if defined(OS_ANDROID) || defined(OS_IOS)
     NotificationPromo::MOBILE_NTP_SYNC_PROMO,
 #else
     NotificationPromo::NTP_NOTIFICATION_PROMO,
     NotificationPromo::NTP_BUBBLE_PROMO,
 #endif
 };
 
@@ skipping 121 matching lines @@
 }
 
 void PromoResourceService::Unpack(const DictionaryValue& parsed_json) {
   for (size_t i = 0; i < arraysize(kValidPromoTypes); ++i) {
     NotificationPromo notification_promo;
     notification_promo.InitFromJson(parsed_json, kValidPromoTypes[i]);
     if (notification_promo.new_notification())
       ScheduleNotification(notification_promo);
   }
 }