Re-add metadata passthrough on Get operations

filter/featureBreaker/rds.go

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package featureBreaker
 
 import (
         "golang.org/x/net/context"
 
         ds "github.com/luci/gae/service/datastore"
@@ skipping 21 matching lines @@
 
 // TODO(riannucci): Allow the user to specify a multierror which will propagate
 // to the callback correctly.
 
 func (r *dsState) DeleteMulti(keys []ds.Key, cb ds.DeleteMultiCB) error {
         return r.run(func() error {
                 return r.RawInterface.DeleteMulti(keys, cb)
         })
 }
 
-func (r *dsState) GetMulti(keys []ds.Key, cb ds.GetMultiCB) error {
+func (r *dsState) GetMulti(keys []ds.Key, meta ds.MultiMetaGetter, cb ds.GetMultiCB) error {
         return r.run(func() error {
-                return r.RawInterface.GetMulti(keys, cb)
+                return r.RawInterface.GetMulti(keys, meta, cb)
         })
 }
 
 func (r *dsState) PutMulti(keys []ds.Key, vals []ds.PropertyMap, cb ds.PutMultiCB) error {
         return r.run(func() (err error) {
                 return r.RawInterface.PutMulti(keys, vals, cb)
         })
 }
 
 // FilterRDS installs a counter datastore filter in the context.
 func FilterRDS(c context.Context, defaultError error) (context.Context, FeatureBreaker) {
         state := newState(defaultError)
         return ds.AddRawFilters(c, func(ic context.Context, RawDatastore ds.RawInterface) ds.RawInterface {
                 return &dsState{state, RawDatastore}
         }), state
 }