[Sync] Move //sync to //components/sync.

sync/protocol/managed_user_specifics.proto

-// 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.
-//
-// Sync protocol datatype extension for managed user settings.
-
-// Update proto_value_conversions{.h,.cc,_unittest.cc} if you change
-// any fields in this file.
-
-syntax = "proto2";
-
-option optimize_for = LITE_RUNTIME;
-option retain_unknown_fields = true;
-
-package sync_pb;
-
-// Properties of managed user sync objects.
-message ManagedUserSpecifics {
-  // A randomly-generated identifier for the managed user.
-  optional string id = 1;
-  // The human-visible name of the managed user
-  optional string name = 2;
-  // This flag is set by the server to acknowledge that it has committed a
-  // newly created managed user.
-  optional bool acknowledged = 3 [default = false];
-  // Master key for managed user cryptohome.
-  optional string master_key = 4;
-  // A string representing the index of the supervised user avatar on Chrome.
-  // It has the following format:
-  // "chrome-avatar-index:INDEX" where INDEX is an integer.
-  optional string chrome_avatar = 5;
-  // A string representing the index of the supervised user avatar on Chrome OS.
-  // It has the following format:
-  // "chromeos-avatar-index:INDEX" where INDEX is an integer.
-  optional string chromeos_avatar = 6;
-  // Key for signing supervised user's password.
-  optional string password_signature_key = 7;
-  // Key for encrypting supervised user's password.
-  optional string password_encryption_key = 8;
-}