Do not cancel request when an error occurs in a webRequest event handler

chrome/renderer/resources/extensions/web_request_internal_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 webRequestInternal API.
 
 var binding = require('binding').Binding.create('webRequestInternal');
 var eventBindings = require('event_bindings');
 var sendRequest = require('sendRequest').sendRequest;
 var validate = require('schemaUtils').validate;
@@ skipping 72 matching lines @@
   if (opt_extraInfo && opt_extraInfo.indexOf('blocking') >= 0) {
     var eventName = this.eventName;
     subEventCallback = function() {
       var requestId = arguments[0].requestId;
       try {
         var result = $Function.apply(cb, null, arguments);
         webRequestInternal.eventHandled(
             eventName, subEventName, requestId, result);
       } catch (e) {
         webRequestInternal.eventHandled(
-            eventName, subEventName, requestId, {cancel: true});
+            eventName, subEventName, requestId);
         throw e;
       }
     };
   } else if (opt_extraInfo && opt_extraInfo.indexOf('asyncBlocking') >= 0) {
     var eventName = this.eventName;
     subEventCallback = function() {
       var details = arguments[0];
       var requestId = details.requestId;
       var handledCallback = function(response) {
         webRequestInternal.eventHandled(
@@ skipping 77 matching lines @@
   'addListener',
   'removeListener',
   'addRules',
   'removeRules',
   'getRules'
 ]);
 
 webRequestInternal = binding.generate();
 exports.binding = webRequestInternal;
 exports.WebRequestEvent = WebRequestEvent;