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

sync/protocol/app_list_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 the app list (aka app launcher).
-
-// Update proto_{value,enum}_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 app list objects.
-message AppListSpecifics {
-  // Unique identifier for the item:
-  // * TYPE_FOLDER: Folder id (generated)
-  // * TYPE_APP: App Id
-  // * TYPE_URL: Url
-  optional string item_id = 1;
-
-  // What type of item this is.
-  enum AppListItemType {
-    // An extension app.
-    TYPE_APP = 1;
-    // A request to remove any matching default installed apps.
-    TYPE_REMOVE_DEFAULT_APP = 2;
-    // A folder containing entries whose |parent_id| matches |item_id|.
-    TYPE_FOLDER = 3;
-    // A URL shortcut (functionally equivalent to a bookmark).
-    TYPE_URL = 4;
-  }
-  optional AppListItemType item_type = 2;
-
-  // Item name (FOLDER or URL).
-  optional string item_name = 3;
-
-  // Id of the parent (folder) item.
-  optional string parent_id = 4;
-
-  // Marked OBSOLETE because this is unused for the app list.
-  // Which page this item will appear on in the app list.
-  optional string OBSOLETE_page_ordinal = 5 [deprecated = true];
-
-  // Where on a page this item will appear.
-  optional string item_ordinal = 6;
-
-  // Where on a shelf this item will appear.
-  optional string item_pin_ordinal = 7;
-}