Don't warmup the app list if it hasn't been used in the past 28 days. [Win]

chrome/browser/ui/app_list/app_list_service.cc

 // Copyright 2013 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/ui/app_list/app_list_service.h"
 
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
 #include "base/prefs/pref_registry_simple.h"
 #include "base/process/process_info.h"
@@ skipping 127 matching lines @@
 void AppListService::RegisterPrefs(PrefRegistrySimple* registry) {
   registry->RegisterInt64Pref(prefs::kLastAppListLaunchPing, 0);
   registry->RegisterIntegerPref(prefs::kAppListLaunchCount, 0);
   registry->RegisterInt64Pref(prefs::kLastAppListAppLaunchPing, 0);
   registry->RegisterIntegerPref(prefs::kAppListAppLaunchCount, 0);
   registry->RegisterStringPref(prefs::kAppListProfile, std::string());
   registry->RegisterBooleanPref(prefs::kAppLauncherHasBeenEnabled, false);
   registry->RegisterIntegerPref(prefs::kAppListEnableMethod,
                                 ENABLE_NOT_RECORDED);
   registry->RegisterInt64Pref(prefs::kAppListEnableTime, 0);
+  registry->RegisterInt64Pref(prefs::kAppListLastLaunchTime, 0);
 
 #if defined(OS_MACOSX)
   registry->RegisterIntegerPref(prefs::kAppLauncherShortcutVersion, 0);
 #endif
 
   // Identifies whether we should show the app launcher promo or not. This
   // becomes false when the user dismisses the promo.
   registry->RegisterBooleanPref(prefs::kShowAppLauncherPromo, true);
 }
 
 // static
 bool AppListService::HandleLaunchCommandLine(
     const base::CommandLine& command_line,
     Profile* launch_profile) {
   InitAll(launch_profile, launch_profile->GetPath());
   if (!command_line.HasSwitch(switches::kShowAppList))
     return false;
 
   // The --show-app-list switch is used for shortcuts on the native desktop.
   AppListService* service = Get(chrome::HOST_DESKTOP_TYPE_NATIVE);
   DCHECK(service);
   RecordStartupInfo(service, command_line, launch_profile);
   service->ShowForProfile(launch_profile);
   return true;
 }