Revert "Refactor current GAE abstraction library to be free of the SDK*"

go/src/infra/gae/libs/wrapper/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.
 
-package gae
+package wrapper
 
 type key int
 
 var (
         globalInfoKey key
 
-        rawDatastoreKey key = 1
-        memcacheKey     key = 2
-        taskQueueKey    key = 3
+        datastoreKey key = 1
+        memcacheKey  key = 2
+        taskQueueKey key = 3
 
-        datastoreKey key = 4
-
+        timeNowKey  key = 4
         mathRandKey key = 5
 )