Add private system extension API to get system update status

chrome/common/extensions/extension_permission_set.cc

 // Copyright (c) 2011 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/extensions/extension_permission_set.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/memory/singleton.h"
@@ skipping 312 matching lines @@
   RegisterPermission(
       ExtensionAPIPermission::kWebRequest, "webRequest", 0,
       ExtensionPermissionMessage::kNone, none);
   RegisterPermission(
       ExtensionAPIPermission::kWebSocketProxyPrivate,
       "webSocketProxyPrivate", 0,
       ExtensionPermissionMessage::kNone, none);
 
   // Private permissions
   RegisterPermission(
+      ExtensionAPIPermission::kAccessibilityPrivate, "accessibilityPrivate", 0,
+      ExtensionPermissionMessage::kNone, component_only);
+  RegisterPermission(
       ExtensionAPIPermission::kChromeosInfoPrivate, "chromeosInfoPrivate", 0,
       ExtensionPermissionMessage::kNone, component_only);
   RegisterPermission(
       ExtensionAPIPermission::kFileBrowserPrivate, "fileBrowserPrivate", 0,
       ExtensionPermissionMessage::kNone, component_only);
   RegisterPermission(
       ExtensionAPIPermission::kMediaPlayerPrivate, "mediaPlayerPrivate", 0,
       ExtensionPermissionMessage::kNone, component_only);
   RegisterPermission(
       ExtensionAPIPermission::kMetricsPrivate, "metricsPrivate", 0,
@@ skipping 516 matching lines @@
   std::set<std::string> new_hosts_set(GetDistinctHosts(new_list, false, false));
   std::set<std::string> old_hosts_set(GetDistinctHosts(old_list, false, false));
   std::set<std::string> new_hosts_only;
 
   std::set_difference(new_hosts_set.begin(), new_hosts_set.end(),
                       old_hosts_set.begin(), old_hosts_set.end(),
                       std::inserter(new_hosts_only, new_hosts_only.begin()));
 
   return !new_hosts_only.empty();
 }