Returning const ref instead of const value in QuicStreamRequest::origin_host

net/quic/quic_stream_factory.h

 // 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.
 
 #ifndef NET_QUIC_QUIC_STREAM_FACTORY_H_
 #define NET_QUIC_QUIC_STREAM_FACTORY_H_
 
 #include <list>
 #include <map>
 #include <string>
@@ skipping 56 matching lines @@
               base::StringPiece method,
               const BoundNetLog& net_log,
               const CompletionCallback& callback);
 
   void OnRequestComplete(int rv);
 
   scoped_ptr<QuicHttpStream> ReleaseStream();
 
   void set_stream(scoped_ptr<QuicHttpStream> stream);
 
-  const std::string origin_host() const { return origin_host_; }
+  const std::string& origin_host() const { return origin_host_; }
 
   PrivacyMode privacy_mode() const { return privacy_mode_; }
 
   const BoundNetLog& net_log() const{
     return net_log_;
   }
 
  private:
   QuicStreamFactory* factory_;
   HostPortPair host_port_pair_;
@@ skipping 339 matching lines @@
   base::TaskRunner* task_runner_;
 
   base::WeakPtrFactory<QuicStreamFactory> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicStreamFactory);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_STREAM_FACTORY_H_