Change gae to apache 2 license.

service/datastore/types.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.
 
 //go:generate stringer -type=Toggle
 
 package datastore
 
 // GeoPoint represents a location as latitude/longitude in degrees.
 //
 // You probably shouldn't use these, but their inclusion here is so that the
 // datastore service can interact (and round-trip) correctly with other
 // datastore API implementations.
@@ skipping 204 matching lines @@
 func (r *ExistsResult) Len(i ...int) int {
         switch len(i) {
         case 0:
                 return len(r.values)
         case 1:
                 return len(r.slices[i[0]])
         default:
                 panic("this method takes zero or one arguments")
         }
 }