Rename methods and members and const variables to alternative service.

net/http/http_network_session.h

Index: net/http/http_network_session.h
diff --git a/net/http/http_network_session.h b/net/http/http_network_session.h
index cd18f79ccc22337eaa4af6b1c035f5fcd9042c85..95fea4cd7bee874614fc528d113f4b5432d2a7a9 100644
--- a/net/http/http_network_session.h
+++ b/net/http/http_network_session.h
@@ -104,7 +104,7 @@ class NET_EXPORT HttpNetworkSession
     // Noe: Using this in the case of NPN for HTTP only results in the browser
     // trying SSL and then falling back to http.
     bool use_alternate_protocols;
-    double alternate_protocol_probability_threshold;
+    double alternative_service_probability_threshold;
 
     bool enable_quic;
     bool enable_quic_for_proxies;