[Sync] Add cookie jar mismatch logging

sync/protocol/sync.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 for communication between sync client and server.
 
 // Update proto_value_conversions{.h,.cc,_unittest.cc} if you change
 // any fields in this file.
 
 syntax = "proto2";
@@ skipping 382 matching lines @@
 
 // Client specific configuration information.
 message ClientConfigParams {
   // The set of data types this client has enabled. Note that this does not
   // include proxy types, as they do not have protocol field numbers and are
   // placeholder types that implicitly enable protocol types.
  repeated int32 enabled_type_ids = 1;
 
  // Whether the PROXY_TABS proxy datatype is enabled on this client.
  optional bool tabs_datatype_enabled = 2;
+
+ // Whether the account(s) present in the content area's cookie jar match the
+ // chrome account. If multiple accounts are present in the cookie jar, a
+ // mismatch implies all of them are different from the chrome account.
+ optional bool cookie_jar_mismatch = 3;
 };
 
 message CommitMessage {
   repeated SyncEntity entries = 1;
 
   // A GUID that identifies the committing sync client.  This value will be
   // returned as originator_cache_guid for any new items.
   optional string cache_guid = 2;
 
   repeated ChromiumExtensionsActivity extensions_activity = 3;
@@ skipping 610 matching lines @@
 };
 
 // A message indicating that the sync engine has been disabled on a client.
 message SyncDisabledEvent {
   // The GUID that identifies the sync client.
   optional string cache_guid = 1;
 
   // The store birthday that the client was using before disabling sync.
   optional string store_birthday = 2;
 };