Avoid setting a duplicate SpdySessionKey on a Request

net/http/http_stream_factory_impl_request.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_REQUEST_H_
 #define NET_HTTP_HTTP_STREAM_FACTORY_IMPL_REQUEST_H_
 
 #include <set>
 #include "base/memory/scoped_ptr.h"
 #include "net/base/net_log.h"
@@ skipping 19 matching lines @@
   virtual ~Request();
 
   // The GURL from the HttpRequestInfo the started the Request.
   const GURL& url() const { return url_; }
 
   // Called when the Job determines the appropriate |spdy_session_key| for the
   // Request. Note that this does not mean that SPDY is necessarily supported
   // for this SpdySessionKey, since we may need to wait for NPN to complete
   // before knowing if SPDY is available.
   void SetSpdySessionKey(const SpdySessionKey& spdy_session_key);
+  bool HasSpdySessionKey() const;
 
   // Attaches |job| to this request. Does not mean that Request will use |job|,
   // but Request will own |job|.
   void AttachJob(HttpStreamFactoryImpl::Job* job);
 
   // Marks completion of the request. Must be called before OnStreamReady().
   // |job_net_log| is the BoundNetLog of the Job that fulfilled this request.
   void Complete(bool was_npn_negotiated,
                 NextProto protocol_negotiated,
                 bool using_spdy,
@@ skipping 83 matching lines @@
   // Protocol negotiated with the server.
   NextProto protocol_negotiated_;
   bool using_spdy_;
 
   DISALLOW_COPY_AND_ASSIGN(Request);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_STREAM_FACTORY_IMPL_REQUEST_H_