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

sync/protocol/priority_preference_specifics.proto

Index: sync/protocol/priority_preference_specifics.proto
diff --git a/sync/protocol/priority_preference_specifics.proto b/sync/protocol/priority_preference_specifics.proto
deleted file mode 100644
index 97b554e3ed6538869895e2cd5e4a6134bb993667..0000000000000000000000000000000000000000
--- a/sync/protocol/priority_preference_specifics.proto
+++ /dev/null
@@ -1,22 +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 priority preferences.
-
-// 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 "preference_specifics.proto";
-
-// Properties of a synced priority preference.
-message PriorityPreferenceSpecifics {
-  optional PreferenceSpecifics preference = 1;
-}