[Sync] Create new top-level sync/ directory

chrome/browser/sync/protocol/app_setting_specifics.proto

Index: chrome/browser/sync/protocol/app_setting_specifics.proto
diff --git a/chrome/browser/sync/protocol/app_setting_specifics.proto b/chrome/browser/sync/protocol/app_setting_specifics.proto
deleted file mode 100644
index d936c668db02971b1e5175c975f021fc6c8fc3e4..0000000000000000000000000000000000000000
--- a/chrome/browser/sync/protocol/app_setting_specifics.proto
+++ /dev/null
@@ -1,25 +0,0 @@
-// 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 an app setting.
-// This is the same as for an extension setting, but uses a separate datatype
-// in order to control syncability separately.
-
-// 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 "extension_setting_specifics.proto";
-
-// Properties of app setting sync objects; just an extension setting.
-message AppSettingSpecifics {
-  optional ExtensionSettingSpecifics extension_setting = 1;
-}
-