Introduce RequestWebSocketStream into HttpStreamFactory

net/http/http_network_session.h

Index: net/http/http_network_session.h
diff --git a/net/http/http_network_session.h b/net/http/http_network_session.h
index b43c301694586fac8123b799d257ec2114790e8b..96dd687b7285fdf13a1c4206b8ac569b5b65909b 100644
--- a/net/http/http_network_session.h
+++ b/net/http/http_network_session.h
@@ -6,6 +6,8 @@
 #define NET_HTTP_HTTP_NETWORK_SESSION_H_
 
 #include <set>
+#include <string>
+
 #include "base/memory/ref_counted.h"
 #include "base/threading/non_thread_safe.h"
 #include "net/base/host_port_pair.h"
@@ -136,6 +138,9 @@ class NET_EXPORT HttpNetworkSession
   HttpStreamFactory* http_stream_factory() {
     return http_stream_factory_.get();
   }
+  HttpStreamFactory* websocket_stream_factory() {
+    return websocket_stream_factory_.get();
+  }
   NetLog* net_log() {
     return net_log_;
   }
@@ -190,6 +195,7 @@ class NET_EXPORT HttpNetworkSession
   QuicStreamFactory quic_stream_factory_;
   SpdySessionPool spdy_session_pool_;
   scoped_ptr<HttpStreamFactory> http_stream_factory_;
+  scoped_ptr<HttpStreamFactory> websocket_stream_factory_;
   std::set<HttpResponseBodyDrainer*> response_drainers_;
 
   Params params_;