Update chrome for new prefs location.

chrome/browser/ui/webui/downloads_ui_browsertest.cc

 // Copyright 2013 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 "chrome/browser/ui/webui/downloads_ui_browsertest.h"
 
 #include "base/command_line.h"
-#include "base/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/webui/downloads_util.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
+#include "components/prefs/pref_service.h"
 #include "content/public/test/test_utils.h"
 
 DownloadsUIBrowserTest::DownloadsUIBrowserTest() {}
 
 DownloadsUIBrowserTest::~DownloadsUIBrowserTest() {}
 
 void DownloadsUIBrowserTest::SetUpCommandLine(
     base::CommandLine* command_line) {
   WebUIBrowserTest::SetUpCommandLine(command_line);
   command_line->AppendSwitch(switches::kDisableMaterialDesignDownloads);
   ASSERT_FALSE(MdDownloadsEnabled());
 }
 
 void DownloadsUIBrowserTest::SetDeleteAllowed(bool allowed) {
   browser()->profile()->GetPrefs()->
       SetBoolean(prefs::kAllowDeletingBrowserHistory, allowed);
 }