Returning const ref instead of const value in DictionaryPreferenceIterator::url

net/sdch/sdch_owner.cc

Index: net/sdch/sdch_owner.cc
diff --git a/net/sdch/sdch_owner.cc b/net/sdch/sdch_owner.cc
index 7f5f1af866aea558aa74c357f01ed22378afd96f..ca9b5a77fab4fe3bd870fe86b797c0baf31db8fe 100644
--- a/net/sdch/sdch_owner.cc
+++ b/net/sdch/sdch_owner.cc
@@ -123,7 +123,7 @@ class DictionaryPreferenceIterator {
   void Advance();
 
   const std::string& server_hash() const { return server_hash_; }
-  const GURL url() const { return url_; }
+  const GURL& url() const { return url_; }
   base::Time last_used() const { return last_used_; }
   int use_count() const { return use_count_; }
   int size() const { return size_; }