Change gae to apache 2 license.

service/urlfetch/context.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 urlfetch provides a way for an application to get http.RoundTripper
 // that can make outbound HTTP requests. If used for https:// protocol, will
 // always validate SSL certificates.
 package urlfetch
 
 import (
         "errors"
         "net/http"
 
@@ skipping 23 matching lines @@
 func SetFactory(c context.Context, f Factory) context.Context {
         return context.WithValue(c, serviceKey, f)
 }
 
 // Set sets the current http.RoundTripper object in the context. Useful for
 // testing with a quick mock. This is just a shorthand SetFactory invocation
 // to set a factory which always returns the same object.
 func Set(c context.Context, r http.RoundTripper) context.Context {
         return SetFactory(c, func(context.Context) http.RoundTripper { return r })
 }