Remove more dead app list 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/features.h"
 #include "chrome/common/pref_font_webkit_names.h"
@@ skipping 2178 matching lines @@
 // 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";
 
 // Keeps local state of app list while sync service is not available.
 const char kAppListLocalState[] = "app_list.local_state";
 
-#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.
@@ skipping 306 matching lines @@
 // settings.
 const char kSettingsResetPromptLastTriggeredForStartupUrls[] =
     "settings_reset_prompt.last_triggered_for_startup_urls";
 
 // Timestamp of the last time the settings reset prompt was shown during the
 // current prompt wave asking the user if they want to restore their homepage.
 const char kSettingsResetPromptLastTriggeredForHomepage[] =
     "settings_reset_prompt.last_triggered_for_homepage";
 
 }  // namespace prefs