Change gae to apache 2 license.

service/datastore/checkfilter.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 datastore
 
 import (
         "fmt"
 
         "github.com/luci/gae/service/info"
         "github.com/luci/luci-go/common/errors"
         "golang.org/x/net/context"
 )
@@ skipping 105 matching lines @@
                 return nil
         }
         return tcf.RawInterface.DeleteMulti(keys, cb)
 }
 
 func applyCheckFilter(c context.Context, i RawInterface) RawInterface {
         inf := info.Get(c)
         ns, _ := inf.GetNamespace()
         return &checkFilter{i, inf.FullyQualifiedAppID(), ns}
 }