Change QuicStreamRequest::Request() to take a preferred QuicVersion so that

net/http/http_stream_factory_impl_job.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_HTTP_HTTP_STREAM_FACTORY_IMPL_JOB_H_
 #define NET_HTTP_HTTP_STREAM_FACTORY_IMPL_JOB_H_
 
 #include <memory>
 #include <utility>
 
@@ skipping 130 matching lines @@
     // for this SpdySessionKey, since we may need to wait for NPN to complete
     // before knowing if SPDY is available.
     virtual void SetSpdySessionKey(Job* job,
                                    const SpdySessionKey& spdy_session_key) = 0;
 
     // Remove session from the SpdySessionRequestMap.
     virtual void RemoveRequestFromSpdySessionRequestMapForJob(Job* job) = 0;
 
     virtual const NetLogWithSource* GetNetLog() const = 0;
 
+    virtual const QuicVersionVector& GetAdvertisedQuicVersions() const = 0;

[Ryan Hamilton, 2017/06/28 18:53:14]

nit: Comment.

[Zhongyi Shi, 2017/07/05 23:08:59]

This method has been removed.

+
     virtual WebSocketHandshakeStreamBase::CreateHelper*
     websocket_handshake_stream_create_helper() = 0;
 
     virtual void MaybeSetWaitTimeForMainJob(const base::TimeDelta& delay) = 0;
 
     virtual bool for_websockets() = 0;
   };
 
   // Job is owned by |delegate|, hence |delegate| is valid for the lifetime of
   // the Job.
@@ skipping 390 matching lines @@
       HostPortPair destination,
       GURL origin_url,
       const ProxyServer& alternative_proxy_server,
       bool enable_ip_based_pooling,
       NetLog* net_log);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_STREAM_FACTORY_IMPL_JOB_H_