Convert JsonWriter::Write to taking a const ref for the in-param

chrome/browser/sync/test/integration/profile_sync_service_harness.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/sync/test/integration/profile_sync_service_harness.h"
 
 #include <cstddef>
 #include <iterator>
 #include <ostream>
 #include <sstream>
@@ skipping 451 matching lines @@
 }
 
 bool ProfileSyncServiceHarness::IsTypePreferred(syncer::ModelType type) {
   return service()->GetPreferredDataTypes().Has(type);
 }
 
 std::string ProfileSyncServiceHarness::GetServiceStatus() {
   scoped_ptr<base::DictionaryValue> value(
       sync_ui_util::ConstructAboutInformation(service()));
   std::string service_status;
-  base::JSONWriter::WriteWithOptions(value.get(),
-                                     base::JSONWriter::OPTIONS_PRETTY_PRINT,
-                                     &service_status);
+  base::JSONWriter::WriteWithOptions(
+      *value, base::JSONWriter::OPTIONS_PRETTY_PRINT, &service_status);
   return service_status;
 }