Add PolicyProvider to ExtensionManagement

extensions/browser/admin_policy.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_ADMIN_POLICY_H_
-#define EXTENSIONS_BROWSER_ADMIN_POLICY_H_
-
-#include "base/values.h"
-
-namespace extensions {
-
-class Extension;
-
-// Functions for providing information about the extension whitelist,
-// blacklist, and forcelist imposed by admin policy.
-namespace admin_policy {
-
-// Checks if extensions are blacklisted by default, by policy. When true, this
-// means that even extensions without an ID should be blacklisted (e.g.
-// from the command line, or when loaded as an unpacked extension).
-bool BlacklistedByDefault(const base::ListValue* blacklist);
-
-// Returns true if the extension is allowed by the admin policy.
-bool UserMayLoad(const base::ListValue* blacklist,
-                 const base::ListValue* whitelist,
-                 const base::DictionaryValue* forcelist,
-                 const base::ListValue* allowed_types,
-                 const Extension* extension,
-                 base::string16* error);
-
-// Returns false if the extension is required to remain running. In practice
-// this enforces the admin policy forcelist.
-bool UserMayModifySettings(const Extension* extension, base::string16* error);
-
-// Returns false if the extension is required to remain running. In practice
-// this enforces the admin policy forcelist.
-bool MustRemainEnabled(const Extension* extension, base::string16* error);
-
-}  // namespace admin_policy
-}  // namespace extensions
-
-#endif  // EXTENSIONS_BROWSER_ADMIN_POLICY_H_