WIP for integration between Chrome and Google Web History.

chrome/browser/history/history.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.
 
 // The history system runs on a background thread so that potentially slow
 // database operations don't delay the browser. This backend processing is
 // represented by HistoryBackend. The HistoryService's job is to dispatch to
 // that thread.
 //
 // Main thread                       History thread
@@ skipping 849 matching lines @@
                          bookmark_service_));
   history_backend_.swap(backend);
 
   // There may not be a profile when unit testing.
   std::string languages;
   if (profile_) {
     PrefService* prefs = profile_->GetPrefs();
     languages = prefs->GetString(prefs::kAcceptLanguages);
   }
   ScheduleAndForget(PRIORITY_UI, &HistoryBackend::Init, languages, no_db_);
+
+  // Create a WebHistoryService instance for this profile. This is used to
+  // fetch visits from other devices from Google Web History.
+  history::WebHistoryService::GetForProfile(profile_);
 }
 
 void HistoryService::OnDBLoaded(int backend_id) {
   if (!history_backend_ || current_backend_id_ != backend_id) {
     VLOG(1) << "Message from obsolete backend";
     return;
   }
   backend_loaded_ = true;
   content::NotificationService::current()->Notify(
       chrome::NOTIFICATION_HISTORY_LOADED,
@@ skipping 34 matching lines @@
 void HistoryService::RemoveVisitDatabaseObserver(
     history::VisitDatabaseObserver* observer) {
   visit_database_observers_->RemoveObserver(observer);
 }
 
 void HistoryService::NotifyVisitDBObserversOnAddVisit(
     const history::BriefVisitInfo& info) {
   visit_database_observers_->Notify(
       &history::VisitDatabaseObserver::OnAddVisit, info);
 }