Add IsDevAppServer implementation to impl/memory.

impl/memory/info.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 (
         "fmt"
         "regexp"
 
@@ skipping 50 matching lines @@
         return context.WithValue(gi.c, giContextKey, &globalInfoData{ns}), nil
 }
 
 func (gi *giImpl) AppID() string {
         return globalAppID
 }
 
 func (gi *giImpl) FullyQualifiedAppID() string {
         return globalAppID
 }
+
+func (gi *giImpl) IsDevAppServer() bool {
+        return true
+}