Don't augment GUID in ONC merging.

chrome/test/data/extensions/api_test/networking/test.js

 // Copyright (c) 2013 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.
 
 var callbackPass = chrome.test.callbackPass;
 var callbackFail = chrome.test.callbackFail;
 var assertTrue = chrome.test.assertTrue;
 var assertFalse = chrome.test.assertFalse;
 var assertEq = chrome.test.assertEq;
 
@@ skipping 305 matching lines @@
       callbackPass(function(result) {
         assertEq({
                    "Connectable": {
                      "Active": true,
                      "Effective": "Unmanaged"
                    },
                    "ConnectionState": {
                      "Active": "NotConnected",
                      "Effective": "Unmanaged"
                    },
-                   "GUID": {
-                     "Active": "stub_wifi2",
-                     "Effective": "UserPolicy",
-                     "UserPolicy": "stub_wifi2"
-                   },
+                   "GUID": "stub_wifi2",
                    "Name": {
                      "Active": "wifi2_PSK",
                      "Effective": "UserPolicy",
                      "UserPolicy": "My WiFi Network"
                    },
                    "Type": {
                      "Active": "WiFi",
                      "Effective": "UserPolicy",
                      "UserPolicy": "WiFi"
                    },
@@ skipping 169 matching lines @@
     var listener =
         new privateHelpers.watchForCaptivePortalState('wifi', 'Online', done);
     chrome.test.sendMessage('notifyPortalDetectorObservers');
   },
 ];
 
 var testToRun = window.location.search.substring(1);
 chrome.test.runTests(availableTests.filter(function(op) {
   return op.name == testToRun;
 }));