Change gae to apache 2 license.

service/datastore/size_test.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 (
         "bytes"
         "fmt"
         "sort"
         "strings"
         "testing"
 
@@ skipping 57 matching lines @@
         t.Parallel()
 
         Convey("Test EstimateSize", t, func() {
                 for _, tc := range estimateSizeTests {
                         Convey(stablePmString(tc.pm), func() {
                                 So(tc.pm.EstimateSize(), ShouldEqual, tc.expect)
                         })
                 }
         })
 }