Introduce RequestWebSocketStream into HttpStreamFactory

net/http/http_network_transaction.cc

Index: net/http/http_network_transaction.cc
diff --git a/net/http/http_network_transaction.cc b/net/http/http_network_transaction.cc
index 1c55202148edbd05641ba4740990bb46a6fed08b..50891d8cfdf2b9f394d96ee7a0d1b5004b5bcd28 100644
--- a/net/http/http_network_transaction.cc
+++ b/net/http/http_network_transaction.cc
@@ -432,6 +432,13 @@ void HttpNetworkTransaction::OnStreamReady(const SSLConfig& used_ssl_config,
   OnIOComplete(OK);
 }
 
+void HttpNetworkTransaction::OnWebSocketStreamReady(
+    const SSLConfig& used_ssl_config,
+    const ProxyInfo& used_proxy_info,
+    WebSocketStreamBase* stream) {
+  NOTREACHED() << "This function should never be called.";
+}
+
 void HttpNetworkTransaction::OnStreamFailed(int result,
                                             const SSLConfig& used_ssl_config) {
   DCHECK_EQ(STATE_CREATE_STREAM_COMPLETE, next_state_);