Revert of Plumbing for login apps device policy to extensions.

extensions/browser/pref_names.h

 // 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.
 
 #ifndef EXTENSIONS_BROWSER_PREF_NAMES_H_
 #define EXTENSIONS_BROWSER_PREF_NAMES_H_
 
 #include <string>
 
 #include "extensions/browser/extension_prefs_scope.h"
@@ skipping 50 matching lines @@
 // extension blacklist, which is Google controlled.
 extern const char kInstallDenyList[];
 
 // A list containing extensions that Chrome will silently install
 // at startup time. It is a list of strings, each string contains
 // an extension ID and an update URL, delimited by a semicolon.
 // This preference is set by an admin policy, and meant to be only
 // accessed through extensions::ExternalPolicyProvider.
 extern const char kInstallForceList[];
 
-// A list containing apps that Chrome will silently install on the sign-in
-// screen on ChromeOS at startup time. It is a list of strings, each string
-// contains an app ID and an update URL, delimited by a semicolon.
-// This preference is set by an admin policy, and meant to be only accessed
-// through extensions::ExternalPolicyProvider.
-extern const char kInstallSigninList[];
-
 // String pref for what version chrome was last time the extension prefs were
 // loaded.
 extern const char kLastChromeVersion[];
 
 // Time of the last extensions auto-update check.
 extern const char kLastUpdateCheck[];
 
 // Blacklist and whitelist for Native Messaging Hosts.
 extern const char kNativeMessagingBlacklist[];
 extern const char kNativeMessagingWhitelist[];
@@ skipping 30 matching lines @@
 // Extension-set content settings.
 extern const char kPrefContentSettings[];
 
 // Extension-set incognito content settings.
 extern const char kPrefIncognitoContentSettings[];
 
 }  // namespace pref_names
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_PREF_NAMES_H_