Return Request as unique_ptr from JobController::Start().

net/http/http_network_transaction.cc

 // 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.
 
 #include "net/http/http_network_transaction.h"
 
 #include <set>
 #include <utility>
 #include <vector>
 
@@ skipping 822 matching lines @@
 
   response_.network_accessed = true;
 
   next_state_ = STATE_CREATE_STREAM_COMPLETE;
   // IP based pooling is only enabled on a retry after 421 Misdirected Request
   // is received. Alternative Services are also disabled in this case (though
   // they can also be disabled when retrying after a QUIC error).
   if (!enable_ip_based_pooling_)
     DCHECK(!enable_alternative_services_);
   if (ForWebSocketHandshake()) {
-    stream_request_.reset(
+    stream_request_ =
         session_->http_stream_factory_for_websocket()
             ->RequestWebSocketHandshakeStream(
                 *request_, priority_, server_ssl_config_, proxy_ssl_config_,
                 this, websocket_handshake_stream_base_create_helper_,
                 enable_ip_based_pooling_, enable_alternative_services_,
-                net_log_));
+                net_log_);
   } else {
-    stream_request_.reset(session_->http_stream_factory()->RequestStream(
+    stream_request_ = session_->http_stream_factory()->RequestStream(
         *request_, priority_, server_ssl_config_, proxy_ssl_config_, this,
-        enable_ip_based_pooling_, enable_alternative_services_, net_log_));
+        enable_ip_based_pooling_, enable_alternative_services_, net_log_);
   }
   DCHECK(stream_request_.get());
   return ERR_IO_PENDING;
 }
 
 int HttpNetworkTransaction::DoCreateStreamComplete(int result) {
   // If |result| is ERR_HTTPS_PROXY_TUNNEL_RESPONSE, then
   // DoCreateStreamComplete is being called from OnHttpsProxyTunnelResponse,
   // which resets the stream request first. Therefore, we have to grab the
   // connection attempts in *that* function instead of here in that case.
@@ skipping 907 matching lines @@
   if (headers->IsRedirect(nullptr)) {
     UMA_HISTOGRAM_BOOLEAN("Net.RedirectWithUnadvertisedContentEncoding",
                           !result);
     return true;
   }
 
   return result;
 }
 
 }  // namespace net