Change Cronet's "disable_ipv6" to "disable_ipv6_on_wifi"

net/dns/mapped_host_resolver.cc

Index: net/dns/mapped_host_resolver.cc
diff --git a/net/dns/mapped_host_resolver.cc b/net/dns/mapped_host_resolver.cc
index 39c313c74b33d35feeb2131d75e681edd53ebfc9..0003fbb193692e7eb6197dc87f709d8537b9d831 100644
--- a/net/dns/mapped_host_resolver.cc
+++ b/net/dns/mapped_host_resolver.cc
@@ -64,6 +64,14 @@ AddressFamily MappedHostResolver::GetDefaultAddressFamily() const {
   return impl_->GetDefaultAddressFamily();
 }
 
+void MappedHostResolver::SetNoIPv6OnWifi(bool no_ipv6_on_wifi) {
+  impl_->SetNoIPv6OnWifi(no_ipv6_on_wifi);
+}
+
+bool MappedHostResolver::GetNoIPv6OnWifi() {
+  return impl_->GetNoIPv6OnWifi();
+}
+
 int MappedHostResolver::ApplyRules(RequestInfo* info) const {
   HostPortPair host_port(info->host_port_pair());
   if (rules_.RewriteHost(&host_port)) {