Prevent networkingPrivate.forgetNetwork from removing shared configs

chrome/test/data/extensions/api_test/networking_private/chromeos/test.js

Index: chrome/test/data/extensions/api_test/networking_private/chromeos/test.js
diff --git a/chrome/test/data/extensions/api_test/networking_private/chromeos/test.js b/chrome/test/data/extensions/api_test/networking_private/chromeos/test.js
index a2d7084009a31c9f675f23b78b205e19f91fd053..30624a9c8efbad75b3cb6ab354fc91aeba0fcc77 100644
--- a/chrome/test/data/extensions/api_test/networking_private/chromeos/test.js
+++ b/chrome/test/data/extensions/api_test/networking_private/chromeos/test.js
@@ -227,6 +227,20 @@ var availableTests = [
               }));
         }));
   },
+  function forgetPolicyControlledNetwork() {
+    chrome.networkingPrivate.getProperties('stub_wifi2', callbackPass(function(
+        properties) {
+      // Sanity check to verify there is a policy defined config for the network
+      // config that will be set up in this test.
+      chrome.test.assertEq('UserPolicy', properties.Source);
+      chrome.test.assertEq('WiFi', properties.Type);
+      chrome.test.assertEq('WPA-PSK', properties.WiFi.Security);
+      chrome.test.assertEq('wifi2_PSK', properties.WiFi.SSID);
+
+      chrome.networkingPrivate.forgetNetwork(
+          'stub_wifi2', callbackFail('Error.PolicyControlled'));
+    }));
+  },
   function getNetworks() {
     // Test 'type' and 'configured'.
     var filter = {