Add a group policy controlling which sites can install extensions.

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"
 
 namespace prefs {
 
@@ skipping 1338 matching lines @@
 const char kDisableExtensions[] = "extensions.disabled";
 
 // Whether the plugin finder that lets you install missing plug-ins is enabled.
 const char kDisablePluginFinder[] = "plugins.disable_plugin_finder";
 
 // Integer boolean representing the width (in pixels) of the container for
 // browser actions.
 const char kBrowserActionContainerWidth[] =
     "extensions.browseractions.container.width";
 
+// The sites that are allowed to install extensions. These sites should be
+// allowed to install extensions without the scary dangerous downloads bar.
+// Also, when off-store-extension installs are disabled, these sites are exempt.
+const char kExtensionAllowedInstallSites[] = "extensions.allowed_install_sites";
+
 // A whitelist of extension ids the user can install: exceptions from the
-// following blacklist. This is controlled by the administrator.
+// following blacklist.
 const char kExtensionInstallAllowList[] = "extensions.install.allowlist";
+
 // A blacklist, containing extensions the user cannot install. This list can
-// conatin "*" meaning all extensions. This is controlled by the administrator.
-// This list should not be confused with the extension blacklist, which is
-// Google controlled.
+// contain "*" meaning all extensions. This list should not be confused with the
+// extension blacklist, which is Google controlled.
 const char kExtensionInstallDenyList[] = "extensions.install.denylist";
 
 // Whether we have run the extension-alert system (see ExtensionGlobalError)
 // at least once for this profile.
 const char kExtensionAlertsInitializedPref[] = "extensions.alerts.initialized";
 
 // 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
@@ skipping 551 matching lines @@
 const char kInManagedMode[] = "managed_mode";
 
 // Counts how many more times the 'profile on a network share' warning should be
 // shown to the user before the next silence period.
 const char kNetworkProfileWarningsLeft[] = "network_profile.warnings_left";
 // Tracks the time of the last shown warning. Used to reset
 // |network_profile.warnings_left| after a silence period.
 const char kNetworkProfileLastWarningTime[] =
     "network_profile.last_warning_time";
 }  // namespace prefs