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

extensions/common/event_filtering_info.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 "extensions/common/event_filtering_info.h"
 
 #include "base/json/json_writer.h"
 #include "base/values.h"
 
 namespace extensions {
@@ skipping 12 matching lines @@
   has_url_ = true;
 }
 
 void EventFilteringInfo::SetInstanceID(int instance_id) {
   instance_id_ = instance_id;
   has_instance_id_ = true;
 }
 
 scoped_ptr<base::Value> EventFilteringInfo::AsValue() const {
   if (IsEmpty())
-    return scoped_ptr<base::Value>(base::Value::CreateNullValue());
+    return base::Value::CreateNullValue();
 
   scoped_ptr<base::DictionaryValue> result(new base::DictionaryValue);
   if (has_url_)
     result->SetString("url", url_.spec());
 
   if (has_instance_id_)
     result->SetInteger("instanceId", instance_id_);
 
   if (!service_type_.empty())
     result->SetString("serviceType", service_type_);
 
   return result.Pass();
 }
 
 bool EventFilteringInfo::IsEmpty() const {
   return !has_url_ && service_type_.empty() && !has_instance_id_;
 }
 
 }  // namespace extensions