Add HttpProtocolHandler and convert everything to use it

net/cert_net/cert_net_fetcher_impl_unittest.cc

Index: net/cert_net/cert_net_fetcher_impl_unittest.cc
diff --git a/net/cert_net/cert_net_fetcher_impl_unittest.cc b/net/cert_net/cert_net_fetcher_impl_unittest.cc
index da2c116064a68a26628cec9f62cb6095dba94504..1aeaf6da216e61a0fb3bda62d7b95d791f3abadf 100644
--- a/net/cert_net/cert_net_fetcher_impl_unittest.cc
+++ b/net/cert_net/cert_net_fetcher_impl_unittest.cc
@@ -68,7 +68,8 @@ class RequestContext : public URLRequestContext {
     storage_.set_http_transaction_factory(base::MakeUnique<HttpCache>(
         storage_.http_network_session(), HttpCache::DefaultBackend::InMemory(0),
         false /* set_up_quic_server_info */));
-    storage_.set_job_factory(base::MakeUnique<URLRequestJobFactoryImpl>());
+    storage_.set_job_factory(
+        URLRequestJobFactoryImpl::CreateWithHttpProtocolHandlers());
   }
 
   ~RequestContext() override { AssertNoURLRequests(); }