Add and persist a new field in AlternativeServiceInfo to list QUIC verisons advertised

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 ffe89c8b13c441a061f730d972b66b739de0b2c9..ea65f7d505bdafe63cc1c4aa9cf38087f5ad27c0 100644
--- a/components/cronet/android/cronet_url_request_context_adapter.cc
+++ b/components/cronet/android/cronet_url_request_context_adapter.cc
@@ -64,6 +64,7 @@
 #include "net/nqe/network_quality_estimator_params.h"
 #include "net/proxy/proxy_config_service_android.h"
 #include "net/proxy/proxy_service.h"
+#include "net/quic/core/quic_versions.h"
 #include "net/sdch/sdch_owner.h"
 #include "net/ssl/channel_id_service.h"
 #include "net/url_request/url_request_context.h"
@@ -764,8 +765,17 @@ void CronetURLRequestContextAdapter::InitializeOnNetworkThread(
       url::SchemeHostPort quic_server("https", canon_host, quic_hint.port);
       net::AlternativeService alternative_service(
           net::kProtoQUIC, "", static_cast<uint16_t>(quic_hint.alternate_port));
+      QuicVersionVector advertised_versions;
+      HttpNetworkSession::Params* params = context_->GetNetworkSessionParams();
+      if (params) {
+        advertised_versions = params->quic_supported_versions;
+      } else {
+        advertised_versions = CurrentSupportedVersions();

[xunjieli, 2017/06/09 16:41:55]

suggestion for a follow-up:
Consider add a prefix/qualifier to CurrentSupportedVersion(). This static method
is in the global namespace. The name isn't specific enough.
e.g. quic_version::GetSupportedVersions()

[Zhongyi Shi, 2017/06/16 00:24:04]

Will do in a follow-up CL. Since this method is in the shared code. I will need
to add this in the internal code base first.

+      }
+
       context_->http_server_properties()->SetAlternativeService(
-          quic_server, alternative_service, base::Time::Max());
+          quic_server, alternative_service, base::Time::Max(),
+          advertised_versions);
     }
   }