[Sync] Add histograms for cookie jar state on Sessions commit

sync/internal_api/sync_manager_impl.cc

 // 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.
 
 #include "sync/internal_api/sync_manager_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 #include <string>
 #include <utility>
@@ skipping 1008 matching lines @@
   model_type_registry_->RequestEmitDebugInfo();
 }
 
 void SyncManagerImpl::ClearServerData(const ClearServerDataCallback& callback) {
   DCHECK(thread_checker_.CalledOnValidThread());
   scheduler_->Start(SyncScheduler::CLEAR_SERVER_DATA_MODE, base::Time());
   ClearParams params(callback);
   scheduler_->ScheduleClearServerData(params);
 }
 
-void SyncManagerImpl::OnCookieJarChanged(bool account_mismatch) {
+void SyncManagerImpl::OnCookieJarChanged(bool account_mismatch,
+                                         bool empty_jar) {
   DCHECK(thread_checker_.CalledOnValidThread());
   session_context_->set_cookie_jar_mismatch(account_mismatch);
+  session_context_->set_cookie_jar_empty(empty_jar);
 }
 
 }  // namespace syncer