Change gae to apache 2 license.

service/user/user.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 user
 
 import "google.golang.org/appengine/user"
 
 // User is a mimic of https://godoc.org/google.golang.org/appengine/user#User
 //
 // It's provided here for convenience, and is compile-time checked to be
 // identical.
 type User struct {
         Email             string
         AuthDomain        string
         Admin             bool
         ID                string
         ClientID          string
         FederatedIdentity string
         FederatedProvider string
 }
 
 var _ User = (User)(user.User{})