chrome: Use base::MessageLoop. (Part 3)

chrome/browser/history/history_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.
 
 // 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 446 matching lines @@
     const SegmentQueryCallback& callback) {
   DCHECK(thread_checker_.CalledOnValidThread());
   return Schedule(PRIORITY_UI, &HistoryBackend::QuerySegmentDuration,
                   consumer, new history::QuerySegmentUsageRequest(callback),
                   from_time, max_result_count);
 }
 
 void HistoryService::SetOnBackendDestroyTask(const base::Closure& task) {
   DCHECK(thread_checker_.CalledOnValidThread());
   ScheduleAndForget(PRIORITY_NORMAL, &HistoryBackend::SetOnBackendDestroyTask,
-                    MessageLoop::current(), task);
+                    base::MessageLoop::current(), task);
 }
 
 void HistoryService::AddPage(const GURL& url,
                              Time time,
                              const void* id_scope,
                              int32 page_id,
                              const GURL& referrer,
                              const history::RedirectList& redirects,
                              content::PageTransition transition,
                              history::VisitSource visit_source,
@@ skipping 793 matching lines @@
   DCHECK(thread_checker_.CalledOnValidThread());
   visit_database_observers_.RemoveObserver(observer);
 }
 
 void HistoryService::NotifyVisitDBObserversOnAddVisit(
     const history::BriefVisitInfo& info) {
   DCHECK(thread_checker_.CalledOnValidThread());
   FOR_EACH_OBSERVER(history::VisitDatabaseObserver, visit_database_observers_,
                     OnAddVisit(info));
 }