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

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/basictypes.h"
 #include "chrome/common/pref_font_webkit_names.h"
 
 namespace prefs {
@@ skipping 2161 matching lines @@
 const char kAppLauncherHasBeenEnabled[] =
     "apps.app_launcher.has_been_enabled";
 
 // An enum indicating how the app launcher was enabled. E.g., via webstore, app
 // install, command line, etc. For UMA.
 const char kAppListEnableMethod[] = "app_list.how_enabled";
 
 // The time that the app launcher was enabled. Cleared when UMA is recorded.
 const char kAppListEnableTime[] = "app_list.when_enabled";
 
+// The last time the app list was launched.
+const char kAppListLastLaunchTime[] = "app_list.last_launch";
+
 // Integer representing the version of the app launcher shortcut installed on
 // the system. Incremented, e.g., when embedded icons change.
 const char kAppLauncherShortcutVersion[] = "apps.app_launcher.shortcut_version";
 
 // A boolean identifying if we should show the app launcher promo or not.
 const char kShowAppLauncherPromo[] = "app_launcher.show_promo";
 
 // A dictionary that tracks the Drive app to Chrome app mapping. The key is
 // a Drive app id and the value is the corresponding Chrome app id. The pref
 // is unsynable and used to track local mappings only.
@@ skipping 80 matching lines @@
 // (name and a list of clients that registered the whitelist).
 const char kRegisteredSupervisedUserWhitelists[] =
     "supervised_users.whitelists";
 
 #if defined(ENABLE_EXTENSIONS)
 // Policy that indicates how to handle animated images.
 const char kAnimationPolicy[] = "settings.a11y.animation_policy";
 #endif
 
 }  // namespace prefs