From 55455160e132d93ba62906993a551078dad4dfd8 Mon Sep 17 00:00:00 2001
From: william-pan <william49@qq.com>
Date: Sun, 28 Jan 2018 23:15:41 +0800
Subject: [PATCH] Use util.isNative to remove duplicated code

---
 src/core/instance/proxy.js | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/core/instance/proxy.js b/src/core/instance/proxy.js
index 7454712f994..0d6dcf80639 100644
--- a/src/core/instance/proxy.js
+++ b/src/core/instance/proxy.js
@@ -1,7 +1,7 @@
 /* not type checking this file because flow doesn't play well with Proxy */
 
 import config from 'core/config'
-import { warn, makeMap } from '../util/index'
+import { warn, makeMap, isNative } from '../util/index'
 
 let initProxy
 
@@ -25,8 +25,7 @@ if (process.env.NODE_ENV !== 'production') {
   }
 
   const hasProxy =
-    typeof Proxy !== 'undefined' &&
-    Proxy.toString().match(/native code/)
+    typeof Proxy !== 'undefined' && isNative(Proxy)
 
   if (hasProxy) {
     const isBuiltInModifier = makeMap('stop,prevent,self,ctrl,shift,alt,meta,exact')