Remove the app launcher promo code

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 2041 matching lines @@
 
 // The last time the app list was launched.
 const char kAppListLastLaunchTime[] = "app_list.last_launch";
 
 #if defined(OS_MACOSX)
 // 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";
 #endif
 
-// 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.
 const char kAppLauncherDriveAppMapping[] =
     "apps.app_launcher.drive_app_mapping";
 
 // A list of Drive app ids that tracks the uninstallable Drive apps.
 const char kAppLauncherUninstalledDriveApps[] =
     "apps.app_launcher.uninstalled_drive_apps";
 #endif  // defined(ENABLE_APP_LIST)
@@ skipping 103 matching lines @@
 const char kMediaRouterEnableCloudServices[] =
     "media_router.cloudservices.enabled";
 #endif  // defined(GOOGLE_CHROME_BUILD)
 // Whether or not the Media Router first run flow has been acknowledged by the
 // user.
 const char kMediaRouterFirstRunFlowAcknowledged[] =
     "media_router.firstrunflow.acknowledged";
 #endif
 
 }  // namespace prefs