Change gae to apache 2 license.

filter/txnBuf/ds_txn.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 txnBuf
 
 import (
         ds "github.com/luci/gae/service/datastore"
         "github.com/luci/luci-go/common/errors"
         "golang.org/x/net/context"
 )
 
 // ErrTransactionTooLarge is returned when applying an inner transaction would
@@ skipping 98 matching lines @@
         if !d.haveLock {
                 d.state.Lock()
                 defer d.state.Unlock()
         }
         return withTxnBuf(d.ic, cb, opts)
 }
 
 func (d *dsTxnBuf) Testable() ds.Testable {
         return d.state.parentDS.Testable()
 }