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

net/http/http_stream_factory_impl.cc

Index: net/http/http_stream_factory_impl.cc
diff --git a/net/http/http_stream_factory_impl.cc b/net/http/http_stream_factory_impl.cc
index b3ca1f76952737b0d6300aa0a181bd2e89699c52..c1b6eadc86ab4bdb8422a79cf39b308dd43e57cd 100644
--- a/net/http/http_stream_factory_impl.cc
+++ b/net/http/http_stream_factory_impl.cc
@@ -6,7 +6,6 @@
 
 #include <string>
 #include <tuple>
-#include <utility>
 
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
@@ -46,7 +45,7 @@
                           job_controller_set_.size());
 }
 
-std::unique_ptr<HttpStreamRequest> HttpStreamFactoryImpl::RequestStream(
+HttpStreamRequest* HttpStreamFactoryImpl::RequestStream(
     const HttpRequestInfo& request_info,
     RequestPriority priority,
     const SSLConfig& server_ssl_config,
@@ -62,8 +61,7 @@
       enable_alternative_services, net_log);
 }
 
-std::unique_ptr<HttpStreamRequest>
-HttpStreamFactoryImpl::RequestWebSocketHandshakeStream(
+HttpStreamRequest* HttpStreamFactoryImpl::RequestWebSocketHandshakeStream(
     const HttpRequestInfo& request_info,
     RequestPriority priority,
     const SSLConfig& server_ssl_config,
@@ -81,8 +79,7 @@
       enable_alternative_services, net_log);
 }
 
-std::unique_ptr<HttpStreamRequest>
-HttpStreamFactoryImpl::RequestBidirectionalStreamImpl(
+HttpStreamRequest* HttpStreamFactoryImpl::RequestBidirectionalStreamImpl(
     const HttpRequestInfo& request_info,
     RequestPriority priority,
     const SSLConfig& server_ssl_config,
@@ -100,7 +97,7 @@
       enable_alternative_services, net_log);
 }
 
-std::unique_ptr<HttpStreamRequest> HttpStreamFactoryImpl::RequestStreamInternal(
+HttpStreamRequest* HttpStreamFactoryImpl::RequestStreamInternal(
     const HttpRequestInfo& request_info,
     RequestPriority priority,
     const SSLConfig& server_ssl_config,
@@ -120,9 +117,11 @@
       enable_alternative_services, server_ssl_config, proxy_ssl_config);
   JobController* job_controller_raw_ptr = job_controller.get();
   job_controller_set_.insert(std::move(job_controller));
-  return job_controller_raw_ptr->Start(delegate,
-                                       websocket_handshake_stream_create_helper,
-                                       net_log, stream_type, priority);
+  Request* request = job_controller_raw_ptr->Start(
+      delegate, websocket_handshake_stream_create_helper, net_log, stream_type,
+      priority);
+
+  return request;
 }
 
 void HttpStreamFactoryImpl::PreconnectStreams(