Extract PrefServiceBase into chrome/browser/api. Use in api and autofill.

chrome/browser/ui/webui/ntp/app_launcher_handler.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 "chrome/browser/ui/webui/ntp/app_launcher_handler.h"
 
 #include <string>
 #include <vector>
 
 #include "base/auto_reset.h"
@@ skipping 774 matching lines @@
 void AppLauncherHandler::SetAppToBeHighlighted() {
   if (highlight_app_id_.empty())
     return;
 
   StringValue app_id(highlight_app_id_);
   web_ui()->CallJavascriptFunction("ntp.setAppToBeHighlighted", app_id);
   highlight_app_id_.clear();
 }
 
 // static
-void AppLauncherHandler::RegisterUserPrefs(PrefService* pref_service) {
+void AppLauncherHandler::RegisterUserPrefs(PrefServiceBase* pref_service) {
   pref_service->RegisterListPref(prefs::kNtpAppPageNames,
                                  PrefService::SYNCABLE_PREF);
 }
 
 void AppLauncherHandler::CleanupAfterUninstall() {
   extension_id_prompting_.clear();
 }
 
 // static
 void AppLauncherHandler::RecordAppLaunchType(
@@ skipping 134 matching lines @@
 
 ExtensionInstallPrompt* AppLauncherHandler::GetExtensionInstallPrompt() {
   if (!extension_install_ui_.get()) {
     Browser* browser = browser::FindBrowserWithWebContents(
         web_ui()->GetWebContents());
     extension_install_ui_.reset(
         chrome::CreateExtensionInstallPromptWithBrowser(browser));
   }
   return extension_install_ui_.get();
 }