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

extensions/common/event_filtering_info.cc

Index: extensions/common/event_filtering_info.cc
diff --git a/extensions/common/event_filtering_info.cc b/extensions/common/event_filtering_info.cc
index 93b8666e4ab8d39bf7c572743f13342f674f92d3..21809841cc441b82c43f9058f5dba682fe293215 100644
--- a/extensions/common/event_filtering_info.cc
+++ b/extensions/common/event_filtering_info.cc
@@ -30,7 +30,7 @@ void EventFilteringInfo::SetInstanceID(int instance_id) {
 
 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_)