Change gae to apache 2 license.

impl/prod/taskqueue.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 prod
 
 import (
         "fmt"
         "reflect"
 
         tq "github.com/luci/gae/service/taskqueue"
         "golang.org/x/net/context"
         "google.golang.org/appengine"
@@ skipping 117 matching lines @@
         }
         for _, s := range stats {
                 cb((*tq.Statistics)(&s), nil)
         }
         return nil
 }
 
 func (t tqImpl) Testable() tq.Testable {
         return nil
 }