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

components/sync/protocol/BUILD.gn

 # Copyright 2014 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.
 
 import("//third_party/protobuf/proto_library.gni")
 import("protocol_sources.gni")
 
 # This must be a component for the dependency structure we have now, but the
 # proto_library generates a source set. Link those into a component.
 component("protocol") {
   public_deps = [
     ":protocol_internal",
   ]
 }
 
 proto_library("protocol_internal") {
   visibility = [ ":protocol" ]
 
   sources = sync_protocol_sources
 
   cc_generator_options = "dllexport_decl=SYNC_PROTO_EXPORT:"
-  cc_include = "sync/protocol/sync_proto_export.h"
+  cc_include = "components/sync/protocol/sync_proto_export.h"
   component_build_force_source_set = true
 
   defines = [ "SYNC_PROTO_IMPLEMENTATION" ]
 
   extra_configs = [ "//build/config/compiler:wexit_time_destructors" ]
 }