<webview>: Implement WebRequest API

chrome/renderer/resources/extensions/web_request_custom_bindings.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.
 
 // Custom binding for the webRequest API.
 
 var binding = require('binding').Binding.create('webRequest');
 
 var webRequestNatives = requireNative('web_request');
 var GetUniqueSubEventName = webRequestNatives.GetUniqueSubEventName;
 
 var chromeHidden = requireNative('chrome_hidden').GetChromeHidden();
 var sendRequest = require('sendRequest').sendRequest;
 var validate = require('schemaUtils').validate;
 var webRequestInternal = require('webRequestInternal').binding;
 
 // WebRequestEvent object. This is used for special webRequest events with
 // extra parameters. Each invocation of addListener creates a new named
 // sub-event. That sub-event is associated with the extra parameters in the
 // browser process, so that only it is dispatched when the main event occurs
 // matching the extra parameters.
 //
 // Example:
 //   chrome.webRequest.onBeforeRequest.addListener(
 //       callback, {urls: 'http://*.google.com/*'});
 //   ^ callback will only be called for onBeforeRequests matching the filter.
 function WebRequestEvent(eventName, opt_argSchemas, opt_extraArgSchemas,
-                         opt_eventOptions) {
+                         opt_eventOptions, opt_webViewInstanceId) {
   if (typeof eventName != 'string')
     throw new Error('chrome.WebRequestEvent requires an event name.');
 
   this.eventName_ = eventName;
   this.argSchemas_ = opt_argSchemas;
   this.extraArgSchemas_ = opt_extraArgSchemas;
+  this.webViewInstanceId_ = opt_webViewInstanceId ? opt_webViewInstanceId : 0;
   this.subEvents_ = [];
   this.eventOptions_ = chromeHidden.parseEventOptions(opt_eventOptions);
   if (this.eventOptions_.supportsRules) {
     this.eventForRules_ =
         new chrome.Event(eventName, opt_argSchemas, opt_eventOptions);
   }
-};
+}
 
 // Test if the given callback is registered for this event.
 WebRequestEvent.prototype.hasListener = function(cb) {
   if (!this.eventOptions_.supportsListeners)
     throw new Error('This event does not support listeners.');
   return this.findListener_(cb) > -1;
 };
 
 // Test if any callbacks are registered fur thus event.
 WebRequestEvent.prototype.hasListeners = function() {
@@ skipping 11 matching lines @@
   if (!this.eventOptions_.supportsListeners)
     throw new Error('This event does not support listeners.');
   // NOTE(benjhayden) New APIs should not use this subEventName trick! It does
   // not play well with event pages. See downloads.onDeterminingFilename and
   // ExtensionDownloadsEventRouter for an alternative approach.
   var subEventName = GetUniqueSubEventName(this.eventName_);
   // Note: this could fail to validate, in which case we would not add the
   // subEvent listener.
   validate(Array.prototype.slice.call(arguments, 1), this.extraArgSchemas_);
   webRequestInternal.addEventListener(
-      cb, opt_filter, opt_extraInfo, this.eventName_, subEventName);
+      cb, opt_filter, opt_extraInfo, this.eventName_, subEventName,
+      this.webViewInstanceId_);
 
   var subEvent = new chrome.Event(subEventName, this.argSchemas_);
   var subEventCallback = cb;
   if (opt_extraInfo && opt_extraInfo.indexOf('blocking') >= 0) {
     var eventName = this.eventName_;
     subEventCallback = function() {
       var requestId = arguments[0].requestId;
       try {
         var result = cb.apply(null, arguments);
         webRequestInternal.eventHandled(
@@ skipping 74 matching lines @@
   var apiFunctions = api.apiFunctions;
 
   apiFunctions.setHandleRequest('handlerBehaviorChanged', function() {
     var args = Array.prototype.slice.call(arguments);
     sendRequest(this.name, args, this.definition.parameters,
                 {forIOThread: true});
   });
 });
 
 exports.binding = binding.generate();
+exports.WebRequestEvent = WebRequestEvent;