Add a method for encoding directly to a io.Writer and use it for HTTPx

pkg/api/meta/restmapper_test.go

@@ -18,6 +18,7 @@ package meta
 
 import (
 	"errors"
+	"io"
 	"testing"
 
 	"k8s.io/kubernetes/pkg/runtime"
@@ -29,6 +30,10 @@ func (fakeCodec) Encode(runtime.Object) ([]byte, error) {
 	return []byte{}, nil
 }
 
+func (fakeCodec) EncodeToStream(runtime.Object, io.Writer) error {
+	return nil
+}
+
 func (fakeCodec) Decode([]byte) (runtime.Object, error) {
 	return nil, nil
 }