Revert of Unify enum NextProto and enum AlternateProtocol.

components/cronet/android/cronet_url_request_context_adapter.cc

Index: components/cronet/android/cronet_url_request_context_adapter.cc
diff --git a/components/cronet/android/cronet_url_request_context_adapter.cc b/components/cronet/android/cronet_url_request_context_adapter.cc
index fc88f1b673f2fae0d33f884a7931b7fb20748d12..112762c17d925b68581eb5669df826b42e3b0f64 100644
--- a/components/cronet/android/cronet_url_request_context_adapter.cc
+++ b/components/cronet/android/cronet_url_request_context_adapter.cc
@@ -680,7 +680,8 @@
 
       url::SchemeHostPort quic_server("https", canon_host, quic_hint.port);
       net::AlternativeService alternative_service(
-          net::kProtoQUIC, "", static_cast<uint16_t>(quic_hint.alternate_port));
+          net::AlternateProtocol::QUIC, "",
+          static_cast<uint16_t>(quic_hint.alternate_port));
       context_->http_server_properties()->SetAlternativeService(
           quic_server, alternative_service, base::Time::Max());
     }