Change gae to apache 2 license.

impl/memory/datastore_index.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 memory
 
 import (
         "bytes"
         "fmt"
         "sort"
 
         ds "github.com/luci/gae/service/datastore"
         "github.com/luci/gae/service/datastore/serialize"
@@ skipping 246 matching lines @@
         compIdx := []*ds.IndexDefinition{}
         walkCompIdxs(store.Snapshot(), nil, func(i *ds.IndexDefinition) bool {
                 compIdx = append(compIdx, i)
                 return true
         })
 
         mergeIndexes(key.Namespace(), store,
                 indexEntriesWithBuiltins(key, oldEnt, compIdx),
                 indexEntriesWithBuiltins(key, newEnt, compIdx))
 }