<webview>: Cleanup WebRequest event listeners when embedder destroyed

chrome/renderer/resources/extensions/web_view.js

 // Copyright (c) 2012 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.
 
 // Shim that simulates a <webview> tag via Mutation Observers.
 //
 // The actual tag is implemented via the browser plugin. The internals of this
 // are hidden via Shadow DOM.
 
 'use strict';
 
 var DocumentNatives = requireNative('document_natives');
 var EventBindings = require('event_bindings');
 var MessagingNatives = requireNative('messaging_natives');
 var WebRequestEvent = require('webRequestInternal').WebRequestEvent;
 var WebRequestSchema =
     requireNative('schema_registry').GetSchema('webRequest');
 var WebView = require('binding').Binding.create('webview').generate();
+var WebViewNatives = requireNative('webview_natives');
 
 // This secret enables hiding <webview> private members from the outside scope.
 // Outside of this file, |secret| is inaccessible. The only way to access the
 // <webview> element's internal members is via the |secret|. Since it's only
 // accessible by code here (and in web_view_experimental), only <webview>'s
 // API can access it and not external developers.
 var secret = {};
 
 var WEB_VIEW_ATTRIBUTE_MAXHEIGHT = 'maxheight';
 var WEB_VIEW_ATTRIBUTE_MAXWIDTH = 'maxwidth';
 var WEB_VIEW_ATTRIBUTE_MINHEIGHT = 'minheight';
 var WEB_VIEW_ATTRIBUTE_MINWIDTH = 'minwidth';
 
 /** @type {Array.<string>} */
 var WEB_VIEW_ATTRIBUTES = [
     'name',
     'partition',
     'autosize',
     WEB_VIEW_ATTRIBUTE_MINHEIGHT,
     WEB_VIEW_ATTRIBUTE_MINWIDTH,
     WEB_VIEW_ATTRIBUTE_MAXHEIGHT,
     WEB_VIEW_ATTRIBUTE_MAXWIDTH
 ];
 
-var webViewInstanceIdCounter = 0;
-
 var CreateEvent = function(name) {
   var eventOpts = {supportsListeners: true, supportsFilters: true};
   return new EventBindings.Event(name, undefined, eventOpts);
 };
 
 var WEB_VIEW_EVENTS = {
   'close': {
     evt: CreateEvent('webview.onClose'),
     fields: []
   },
@@ skipping 477 matching lines @@
     node.style.height = webViewEvent.newHeight + 'px';
   }
   node.dispatchEvent(webViewEvent);
 };
 
 /**
  * @private
  */
 WebViewInternal.prototype.setupWebviewNodeEvents_ = function() {
   var self = this;
-  this.viewInstanceId_ = ++webViewInstanceIdCounter;
+  this.viewInstanceId_ = WebViewNatives.GetNextInstanceID();
   var onInstanceIdAllocated = function(e) {
     var detail = e.detail ? JSON.parse(e.detail) : {};
     self.instanceId_ = detail.windowId;
     var params = {
       'api': 'webview',
       'instanceId': self.viewInstanceId_
     };
     self.browserPluginNode_['-internal-attach'](params);
 
     var events = self.getEvents_();
@@ skipping 367 matching lines @@
 
 /**
  * Implemented when the experimental API is available.
  * @private
  */
 WebViewInternal.prototype.maybeAttachWebRequestEventToWebview_ = function() {};
 
 exports.WebView = WebView;
 exports.WebViewInternal = WebViewInternal;
 exports.CreateEvent = CreateEvent;