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 42fe60de8f7e468f6d207706c373b7ea113dc76a..c46df5e8f5993afa77a689fb9602bed874d07920 100644
--- a/net/cert_net/cert_net_fetcher_impl_unittest.cc
+++ b/net/cert_net/cert_net_fetcher_impl_unittest.cc
@@ -57,7 +57,8 @@ class RequestContext : public URLRequestContext {
     storage_.set_http_transaction_factory(base::WrapUnique(new HttpCache(
         storage_.http_network_session(), HttpCache::DefaultBackend::InMemory(0),
         false /* set_up_quic_server_info */)));
-    storage_.set_job_factory(base::WrapUnique(new URLRequestJobFactoryImpl()));
+    storage_.set_job_factory(
+        URLRequestJobFactoryImpl::CreateWithDefaultProtocolHandlers());
   }
 
   ~RequestContext() override { AssertNoURLRequests(); }