[Sync] Maintain a global_id mapping to update UserEvents that references navigations

components/browser_sync/profile_sync_service.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 "components/browser_sync/profile_sync_service.h"
 
 #include <stddef.h>
 
 #include <cstddef>
 #include <map>
@@ skipping 2115 matching lines @@
     } else {
       // Control Types
       helper->OnReceivedNodesForType(
           it.Get(),
           syncer::DirectoryDataTypeController::GetAllNodesForTypeFromDirectory(
               it.Get(), GetUserShare()->directory.get()));
     }
   }
 }
 
+syncer::GlobalIdMapper* ProfileSyncService::GetGlobalIdMapper() const {
+  return sessions_sync_manager_.get();
+}
+
 base::WeakPtr<syncer::JsController> ProfileSyncService::GetJsController() {
   DCHECK(thread_checker_.CalledOnValidThread());
   return sync_js_controller_.AsWeakPtr();
 }
 
 // static
 void ProfileSyncService::SyncEvent(SyncEventCodes code) {
   UMA_HISTOGRAM_ENUMERATION("Sync.EventCodes", code, MAX_SYNC_EVENT_CODE);
 }
 
@@ skipping 254 matching lines @@
     return;
 
   DCHECK(startup_controller_->IsSetupInProgress());
   startup_controller_->SetSetupInProgress(false);
 
   if (IsEngineInitialized())
     ReconfigureDatatypeManager();
   NotifyObservers();
 }
 }  // namespace browser_sync