Change gae to apache 2 license.

impl/prod/datastore_key.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.
+// Copyright 2015 The LUCI Authors. All rights reserved.
+// Use of this source code is governed under the Apache License, Version 2.0
+// that can be found in the LICENSE file.
 
 package prod
 
 import (
         ds "github.com/luci/gae/service/datastore"
         "github.com/luci/luci-go/common/errors"
         "golang.org/x/net/context"
         "google.golang.org/appengine"
         "google.golang.org/appengine/datastore"
 )
@@ skipping 52 matching lines @@
 func dsMF2R(aeCtx context.Context, ks []*ds.Key) ([]*datastore.Key, error) {
         lme := errors.NewLazyMultiError(len(ks))
         ret := make([]*datastore.Key, len(ks))
         err := error(nil)
         for i, k := range ks {
                 ret[i], err = dsF2R(aeCtx, k)
                 lme.Assign(i, err)
         }
         return ret, lme.Get()
 }