Handle closing web contents in ExtensionOptionsGuest

chrome/renderer/resources/extensions/extension_options_events.js

 // Copyright 2014 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 EventBindings = require('event_bindings');
 
 var CreateEvent = function(name) {
   var eventOpts = {supportsListeners: true, supportsFilters: true};
   return new EventBindings.Event(name, undefined, eventOpts);
 };
 
 var EXTENSION_OPTIONS_EVENTS = {
+  'close': {
+    evt: CreateEvent('extensionOptionsInternal.onClose'),
+    fields: []
+  },
   'load': {
     evt: CreateEvent('extensionOptionsInternal.onLoad'),
     fields: []
   },
   'sizechanged': {
     evt: CreateEvent('extensionOptionsInternal.onSizeChanged'),
     customHandler: function(handler, event, webViewEvent) {
       handler.handleSizeChangedEvent(event, webViewEvent);
     },
     fields:['width', 'height']
@@ skipping 40 matching lines @@
 
 ExtensionOptionsEvents.prototype.handleSizeChangedEvent = function(
     event, extensionOptionsEvent) {
   this.extensionOptionsInternal.onSizeChanged(extensionOptionsEvent.width,
                                               extensionOptionsEvent.height);
   this.extensionOptionsInternal.dispatchEvent(extensionOptionsEvent);
 }
 
 exports.ExtensionOptionsEvents = ExtensionOptionsEvents;
 exports.CreateEvent = CreateEvent;