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

net/http/http_stream_factory_impl.h

Index: net/http/http_stream_factory_impl.h
diff --git a/net/http/http_stream_factory_impl.h b/net/http/http_stream_factory_impl.h
index d9211d14c198db959fd2763fb58738619bb5f200..58e4fddb9b20adbceb4d9759c82e01e12c7b2ae6 100644
--- a/net/http/http_stream_factory_impl.h
+++ b/net/http/http_stream_factory_impl.h
@@ -8,7 +8,9 @@
 #include <stddef.h>
 
 #include <map>
+#include <memory>
 #include <set>
+#include <string>
 #include <vector>
 
 #include "base/gtest_prod_util.h"
@@ -44,16 +46,17 @@ class NET_EXPORT_PRIVATE HttpStreamFactoryImpl : public HttpStreamFactory {
   ~HttpStreamFactoryImpl() override;
 
   // HttpStreamFactory interface
-  HttpStreamRequest* RequestStream(const HttpRequestInfo& info,
-                                   RequestPriority priority,
-                                   const SSLConfig& server_ssl_config,
-                                   const SSLConfig& proxy_ssl_config,
-                                   HttpStreamRequest::Delegate* delegate,
-                                   bool enable_ip_based_pooling,
-                                   bool enable_alternative_services,
-                                   const NetLogWithSource& net_log) override;
-
-  HttpStreamRequest* RequestWebSocketHandshakeStream(
+  std::unique_ptr<HttpStreamRequest> RequestStream(
+      const HttpRequestInfo& info,
+      RequestPriority priority,
+      const SSLConfig& server_ssl_config,
+      const SSLConfig& proxy_ssl_config,
+      HttpStreamRequest::Delegate* delegate,
+      bool enable_ip_based_pooling,
+      bool enable_alternative_services,
+      const NetLogWithSource& net_log) override;
+
+  std::unique_ptr<HttpStreamRequest> RequestWebSocketHandshakeStream(
       const HttpRequestInfo& info,
       RequestPriority priority,
       const SSLConfig& server_ssl_config,
@@ -64,7 +67,7 @@ class NET_EXPORT_PRIVATE HttpStreamFactoryImpl : public HttpStreamFactory {
       bool enable_alternative_services,
       const NetLogWithSource& net_log) override;
 
-  HttpStreamRequest* RequestBidirectionalStreamImpl(
+  std::unique_ptr<HttpStreamRequest> RequestBidirectionalStreamImpl(
       const HttpRequestInfo& info,
       RequestPriority priority,
       const SSLConfig& server_ssl_config,
@@ -120,7 +123,7 @@ class NET_EXPORT_PRIVATE HttpStreamFactoryImpl : public HttpStreamFactory {
     MAX_ALTERNATIVE_SERVICE_TYPE
   };
 
-  HttpStreamRequest* RequestStreamInternal(
+  std::unique_ptr<HttpStreamRequest> RequestStreamInternal(
       const HttpRequestInfo& info,
       RequestPriority priority,
       const SSLConfig& server_ssl_config,