Change gae to apache 2 license.

service/datastore/pls.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"
         "reflect"
 )
 
 // GetPLS resolves obj into default struct PropertyLoadSaver and
 // MetaGetterSetter implementation.
@@ skipping 230 matching lines @@
         if !ok {
                 structCodecsMutex.Lock()
                 defer structCodecsMutex.Unlock()
                 c = getStructCodecLocked(structType)
         }
         if c.problem != nil {
                 panic(c.problem)
         }
         return c
 }