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

sync/protocol/data_type_state.proto

-// Copyright 2016 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.
-
-syntax = "proto2";
-
-option optimize_for = LITE_RUNTIME;
-option retain_unknown_fields = true;
-
-package sync_pb;
-
-import "sync.proto";
-
-// Sync proto to store data type global metadata in model type storage.
-message DataTypeState {
-  // The latest progress markers received from the server.
-  optional DataTypeProgressMarker progress_marker = 1;
-
-  // A data type context.  Sent to the server in every commit or update
-  // request.  May be updated by either responses from the server or requests
-  // made on the model thread.  The interpretation of this value may be
-  // data-type specific.  Many data types ignore it.
-  optional DataTypeContext type_context = 2;
-
-  // This value is set if this type's data should be encrypted on the server.
-  // If this key changes, the client will need to re-commit all of its local
-  // data to the server using the new encryption key.
-  optional string encryption_key_name = 3;
-
-  // This flag is set to true when the first download cycle is complete.  The
-  // ModelTypeProcessor should not attempt to commit any items until this
-  // flag is set.
-  optional bool initial_sync_done = 4;
-}