Disable AltSvc from insecure origin.

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 41e172bedb7c8bc2d9e283271fe60ce9ee9d9391..2903c650f2fcbf11d5f8788cfeaa24b57a5510a3 100644
--- a/net/http/http_network_session.h
+++ b/net/http/http_network_session.h
@@ -99,6 +99,10 @@ class NET_EXPORT HttpNetworkSession
     // Whether to enable Alt-Svc entries with hostname different than that of
     // the origin.
     bool enable_alternative_service_with_different_host;
+    // Only set for tests.
+    // TODO(bnc) https://crbug.com/615497:
+    // Adapt tests to https requests, remove this member.
+    bool enable_alternative_service_for_insecure_origins;
 
     // Enables NPN support.  Note that ALPN is always enabled.
     bool enable_npn;