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

components/sync/protocol/history_delete_directive_specifics.proto

 // 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 history delete directives.
 
 // Update proto_value_conversions{.h,.cc,_unittest.cc} if you change
 // any fields in this file.
 
 syntax = "proto2";
@@ skipping 28 matching lines @@
 
 message TimeRangeDirective {
   // Both fields below must be filled in.  Otherwise, this delete directive
   // must be ignored.
 
   // The time on or after which entries must be deleted.
   optional int64 start_time_usec = 1;
   // The time on or before which entries must be deleted.
   optional int64 end_time_usec = 2;
 }