[Sync] Create new top-level sync/ directory

chrome/browser/sync/protocol/test.proto

Index: chrome/browser/sync/protocol/test.proto
diff --git a/chrome/browser/sync/protocol/test.proto b/chrome/browser/sync/protocol/test.proto
deleted file mode 100644
index 4855d640f30a9f8c0050eab905d34807571fb6e9..0000000000000000000000000000000000000000
--- a/chrome/browser/sync/protocol/test.proto
+++ /dev/null
@@ -1,21 +0,0 @@
-// Copyright (c) 2010 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.
-//
-// Protocol messages used only for testing.
-
-syntax = "proto2";
-
-option optimize_for = LITE_RUNTIME;
-option retain_unknown_fields = true;
-
-package sync_pb;
-
-message UnknownFieldsTestA {
-  required bool foo = 1;
-}
-
-message UnknownFieldsTestB {
-  required bool foo = 1;
-  required bool bar = 2;
-}