Change Cronet's "disable_ipv6" to "disable_ipv6_on_wifi"

net/dns/fuzzed_host_resolver.cc

Index: net/dns/fuzzed_host_resolver.cc
diff --git a/net/dns/fuzzed_host_resolver.cc b/net/dns/fuzzed_host_resolver.cc
index d8e02325206e9c2e36b4305c4789ea7eeb4d2118..f44f3674ccfaf59b0c14cd505f2ee048adc208e4 100644
--- a/net/dns/fuzzed_host_resolver.cc
+++ b/net/dns/fuzzed_host_resolver.cc
@@ -223,7 +223,8 @@ void FuzzedHostResolver::SetDnsClientEnabled(bool enabled) {
   SetDnsClient(std::move(dns_client));
 }
 
-bool FuzzedHostResolver::IsIPv6Reachable(const NetLogWithSource& net_log) {
+bool FuzzedHostResolver::IsGloballyReachable(const IPAddress& dest,
+                                             const NetLogWithSource& net_log) {
   return is_ipv6_reachable_;
 }