signin: pull basic SigninManager functionality into new SigninManagerBase class.

chrome/browser/ui/webui/ntp/new_tab_page_sync_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/new_tab_page_sync_handler.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 76 matching lines @@
   waiting_for_initial_page_load_ = false;
   BuildAndSendSyncStatus();
 }
 
 void NewTabPageSyncHandler::HideSyncStatusSection() {
   SendSyncMessageToPage(HIDE, std::string(), std::string());
 }
 
 void NewTabPageSyncHandler::BuildAndSendSyncStatus() {
   DCHECK(!waiting_for_initial_page_load_);
-  SigninManager* signin = SigninManagerFactory::GetForProfile(
+  SigninManagerBase* signin = SigninManagerFactory::GetForProfile(
       Profile::FromWebUI(web_ui()));
 
   // Hide the sync status section if sync is managed or disabled entirely.
   if (!sync_service_ ||
       sync_service_->IsManaged() ||
       !signin ||
       !signin->IsSigninAllowed()) {
     HideSyncStatusSection();
     return;
   }
@@ skipping 93 matching lines @@
       if (linkurl.empty()) {
         value.SetBoolean("linkurlisset", false);
       } else {
         value.SetBoolean("linkurlisset", true);
         value.SetString("linkurl", linkurl);
       }
     }
   }
   web_ui()->CallJavascriptFunction("ntp.syncMessageChanged", value);
 }