Simplify memory package interface.

go/src/infra/gae/libs/wrapper/memory/memcache.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 memory
 
 import (
         "infra/gae/libs/wrapper"
         "infra/gae/libs/wrapper/gae/commonErrors"
         "infra/gae/libs/wrapper/unsafe"
@@ skipping 21 matching lines @@
 
         data    *memcacheData
         timeNow func() time.Time
 }
 
 var (
         _ = wrapper.Memcache((*memcacheImpl)(nil))
         _ = wrapper.Testable((*memcacheImpl)(nil))
 )
 
-// UseMC adds a wrapper.Memcache implementation to context, accessible
+// useMC adds a wrapper.Memcache implementation to context, accessible
 // by wrapper.GetMC(c)
-func UseMC(c context.Context) context.Context {
+func useMC(c context.Context) context.Context {
         lck := sync.Mutex{}
         mcdMap := map[string]*memcacheData{}
 
         return wrapper.SetMCFactory(c, func(ic context.Context) wrapper.Memcache {
                 lck.Lock()
                 defer lck.Unlock()
 
                 ns := curGID(ic).namespace
                 mcd, ok := mcdMap[ns]
                 if !ok {
@@ skipping 122 matching lines @@
 
         m.data.lock.Lock()
         defer m.data.lock.Unlock()
 
         if _, ok := m.retrieve(key); ok {
                 delete(m.data.items, key)
                 return nil
         }
         return memcache.ErrCacheMiss
 }