More base::Values-related bare pointer -> scoped_ptr conversions

chrome/browser/prefs/prefs_syncable_service_unittest.cc

 // Copyright 2014 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 "base/json/json_reader.h"
 #include "base/json/json_string_value_serializer.h"
 #include "base/json/json_writer.h"
 #include "base/message_loop/message_loop.h"
 #include "base/prefs/scoped_user_pref_update.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 693 matching lines @@
 }
 
 TEST_F(PrefsSyncableServiceTest, DeletePreference) {
   prefs_.SetString(prefs::kHomePage, kExampleUrl0);
   const PrefService::Preference* pref =
       prefs_.FindPreference(prefs::kHomePage);
   EXPECT_FALSE(pref->IsDefaultValue());
 
   InitWithNoSyncData();
 
-  scoped_ptr<base::Value> null_value(base::Value::CreateNullValue());
+  scoped_ptr<base::Value> null_value = base::Value::CreateNullValue();
   syncer::SyncChangeList list;
   list.push_back(MakeRemoteChange(
       1, prefs::kHomePage, *null_value, SyncChange::ACTION_DELETE));
   pref_sync_service_->ProcessSyncChanges(FROM_HERE, list);
   EXPECT_TRUE(pref->IsDefaultValue());
 }