Change gae to apache 2 license.

filter/dsQueryBatch/context.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 dsQueryBatch
 
 import (
         ds "github.com/luci/gae/service/datastore"
         "golang.org/x/net/context"
 )
 
 // BatchQueries installs a datastore filter that causes all queries to be broken
 // into a series of iterative fixed-size queries. The batching uses cursors to
 // chain the iterations together.
 //
 // This helps accommodate query size or time limits enforced by the backing
 // datastore implementation.
 //
 // Note that this expands a single query into a series of queries, which may
 // lose additional single-query consistency guarantees.
 func BatchQueries(c context.Context, batchSize int32) context.Context {
         return ds.AddRawFilters(c, func(ic context.Context, ri ds.RawInterface) ds.RawInterface {
                 return &iterQueryFilter{
                         RawInterface: ri,
                         batchSize:    batchSize,
                 }
         })
 }