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

sync/protocol/device_info_specifics.proto

-// 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.
-//
-// Sync protocol datatype extension for nigori keys.
-
-// 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;
-
-import "sync_enums.proto";
-
-// Information about a device that is running a sync-enabled Chrome browser.  We
-// are mapping the per-client cache guid to more specific information about the
-// device.
-message DeviceInfoSpecifics {
-  // The cache_guid created to identify a sync client on this device.
-  optional string cache_guid = 1;
-
-  // A non-unique but human readable name to describe this client.
-  optional string client_name = 2;
-
-  // The platform of the device.
-  optional SyncEnums.DeviceType device_type = 3;
-
-  // The UserAgent used when contacting the Chrome Sync server.
-  optional string sync_user_agent = 4;
-
-  // The Chrome instance's version.  Updated (if necessary) on every startup.
-  optional string chrome_version = 5;
-
-  // Last time when pre-sync data on the device was saved. The device can be
-  // restored to state back to this time. In millisecond since UNIX epoch.
-  // DEPRECATED in M50.
-  optional int64 deprecated_backup_timestamp = 6 [deprecated=true];
-
-  // Device_id that is stable until user signs out. This device_id is used for
-  // annotating login scoped refresh token.
-  optional string signin_scoped_device_id = 7;
-
-  // This field is updated to be the current time periodically, and is also set
-  // to the current time whenever another field changes. By examining the
-  // difference between this field and the current time, it should be possible
-  // to reason about the inactivity of any device that was syncing at one time.
-  optional int64 last_updated_timestamp = 8;
-}