Change gae to apache 2 license.

impl/memory/error_markers.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 memory
 
 // memoryCorruption is a marker function to indicate that given error is
 // actually due to corrupted memory to make it easier to read the code.
 func memoryCorruption(err error) {
         if err != nil {
                 panic(err)
         }
 }
 
 // impossible is a marker function to indicate that the given error is an
 // impossible state, due to conditions outside of the function.
 func impossible(err error) {
         if err != nil {
                 panic(err)
         }
 }