Settings: Network: Specify a default IPCofig when not set

chrome/browser/resources/settings/internet_page/network_ip_config.js

 // 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.
 
 /**
  * @fileoverview Polymer element for displaying the IP Config properties for
  * a network state. TODO(stevenjb): Allow editing of static IP configurations
  * when 'editable' is true.
  */
 Polymer({
@@ skipping 26 matching lines @@
       type: Boolean,
       value: true,
       observer: 'automaticChanged_',
     },
 
     /**
      * The currently visible IP Config property dictionary. The 'RoutingPrefix'
      * property is a human-readable mask instead of a prefix length.
      * @private {?{
      *   ipv4: !CrOnc.IPConfigUIProperties,
-     *   ipv6: !CrOnc.IPConfigUIProperties
+     *   ipv6: (!CrOnc.IPConfigUIProperties|undefined)
      * }}
      */
     ipConfig_: {
       type: Object,
       value: null,
     },
 
     /**
      * Array of properties to pass to the property list.
      * @private {!Array<string>}
@@ skipping 43 matching lines @@
           CrOnc.getIPConfigForType(this.networkProperties, CrOnc.IPType.IPV6);
       this.ipConfig_ = {
         ipv4: this.getIPConfigUIProperties_(ipv4),
         ipv6: this.getIPConfigUIProperties_(ipv6)
       };
     }
   },
 
   /** @private */
   automaticChanged_: function() {
-    if (!this.automatic_ || !this.ipConfig_) {
-      // When switching from automatic, don't send any changes, ip-change will
-      // be fired in onIPChange when a field is changed.
+    if (!this.automatic_) {
+      // Ensure that there is a valid IPConfig object.
+      this.ipConfig_ = this.ipConfig_ || {
+        ipv4: {
+          Gateway: '192.168.1.1',
+          IPAddress: '192.168.1.1',
+          RoutingPrefix: '255.255.255.0',
+          Type: CrOnc.IPType.IPV4,
+        },
+      };
+      this.sendStaticIpConfig_();
       return;
     }
+
     // Save the static IP configuration when switching to automatic.
-    this.savedStaticIp_ = this.ipConfig_.ipv4;
+    if (this.ipConfig_)
+      this.savedStaticIp_ = this.ipConfig_.ipv4;
     // Send the change.
     this.fire('ip-change', {
       field: 'IPAddressConfigType',
       value: CrOnc.IPConfigType.DHCP,
     });
   },
 
   /**
    * @param {!CrOnc.IPConfigProperties|undefined} ipconfig
    * @return {!CrOnc.IPConfigUIProperties} A new IPConfigUIProperties object
@@ skipping 53 matching lines @@
    *     network-property-list change event.
    * @private
    */
   onIPChange_: function(event) {
     if (!this.ipConfig_)
       return;
     var field = event.detail.field;
     var value = event.detail.value;
     // Note: |field| includes the 'ipv4.' prefix.
     this.set('ipConfig_.' + field, value);
+    this.sendStaticIpConfig_();
+  },
+
+  /** @private */
+  sendStaticIpConfig_: function() {
     // This will also set IPAddressConfigType to STATIC.
     this.fire('ip-change', {
       field: 'StaticIPConfig',
       value: this.getIPConfigProperties_(this.ipConfig_.ipv4)
     });
   },
 });