Migrate callers of message_loop_proxy() to task_runner()

components/history/core/browser/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 342 matching lines @@
       PRIORITY_NORMAL,
       base::Bind(&HistoryBackend::SetOnBackendDestroyTask,
                  history_backend_.get(), base::MessageLoop::current(), task));
 }
 
 void HistoryService::TopHosts(int num_hosts,
                               const TopHostsCallback& callback) const {
   DCHECK(thread_) << "History service being called after cleanup";
   DCHECK(thread_checker_.CalledOnValidThread());
   PostTaskAndReplyWithResult(
-      thread_->message_loop_proxy().get(), FROM_HERE,
+      thread_->task_runner().get(), FROM_HERE,
       base::Bind(&HistoryBackend::TopHosts, history_backend_.get(), num_hosts),
       callback);
 }
 
 void HistoryService::AddPage(const GURL& url,
                              Time time,
                              ContextID context_id,
                              int nav_entry_id,
                              const GURL& referrer,
                              const RedirectList& redirects,
@@ skipping 755 matching lines @@
   return favicon_changed_callback_list_.Add(callback);
 }
 
 void HistoryService::NotifyFaviconChanged(
     const std::set<GURL>& changed_favicons) {
   DCHECK(thread_checker_.CalledOnValidThread());
   favicon_changed_callback_list_.Notify(changed_favicons);
 }
 
 }  // namespace history