Revert of JobController 1: Remove cross reference between Request, Job, and Impl

net/http/http_stream_factory.cc

Index: net/http/http_stream_factory.cc
diff --git a/net/http/http_stream_factory.cc b/net/http/http_stream_factory.cc
index e97323ddb964bac0a962744310c53b1965e4be7b..e94e5fadc5e9523852fdca50ae604689b79b8e12 100644
--- a/net/http/http_stream_factory.cc
+++ b/net/http/http_stream_factory.cc
@@ -95,6 +95,20 @@
       RewriteHost(http_server), alternative_service_info_vector);
 }
 
+GURL HttpStreamFactory::ApplyHostMappingRules(const GURL& url,
+                                              HostPortPair* endpoint) {
+  const HostMappingRules* mapping_rules = GetHostMappingRules();
+  if (mapping_rules && mapping_rules->RewriteHost(endpoint)) {
+    url::Replacements<char> replacements;
+    const std::string port_str = base::UintToString(endpoint->port());
+    replacements.SetPort(port_str.c_str(), url::Component(0, port_str.size()));
+    replacements.SetHost(endpoint->host().c_str(),
+                         url::Component(0, endpoint->host().size()));
+    return url.ReplaceComponents(replacements);
+  }
+  return url;
+}
+
 HttpStreamFactory::HttpStreamFactory() {}
 
 url::SchemeHostPort HttpStreamFactory::RewriteHost(