[Sync] Port about:sync to DOMUI

chrome/browser/sync/sync_ui_util.cc

 // Copyright (c) 2010 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/sync/sync_ui_util.h"
 
 #include "app/l10n_util.h"
 #include "app/resource_bundle.h"
 #include "base/i18n/number_formatting.h"
 #include "base/i18n/time_formatting.h"
@@ skipping 263 matching lines @@
       return "USER_NOT_SIGNED_UP";
     case GoogleServiceAuthError::CONNECTION_FAILED:
       return "CONNECTION_FAILED";
     default:
       return std::string();
   }
 }
 
 void ConstructAboutInformation(ProfileSyncService* service,
                                DictionaryValue* strings) {
-  CHECK(strings != NULL);
-  if (!service->HasSyncSetupCompleted()) {
+  CHECK(strings);
+  if (!service || !service->HasSyncSetupCompleted()) {
     strings->SetString("summary", "SYNC DISABLED");
   } else {
     sync_api::SyncManager::Status full_status(
         service->QueryDetailedSyncStatus());
 
     strings->SetString("service_url", service->sync_service_url().spec());
     strings->SetString("summary",
                        ProfileSyncService::BuildSyncStatusSummaryText(
                        full_status.summary));
 
@@ skipping 100 matching lines @@
 
       DictionaryValue* val = new DictionaryValue;
       val->SetString("stat_name", "Autofill Migration Time");
       val->SetString("stat_value", ConstructTime(info.autofill_migration_time));
       details->Append(val);
     }
   }
 }
 
 }  // namespace sync_ui_util