Move web_request_internal_custom_bindings.js and web_request_custom_bindings.js

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 sendRequest = require('sendRequest').sendRequest;
-var WebRequestEvent = require('webRequestInternal').WebRequestEvent;
-
-binding.registerCustomHook(function(api) {
-  var apiFunctions = api.apiFunctions;
-
-  apiFunctions.setHandleRequest('handlerBehaviorChanged', function() {
-    var args = $Array.slice(arguments);
-    sendRequest(this.name, args, this.definition.parameters,
-                {forIOThread: true});
-  });
-});
-
-binding.registerCustomEvent(WebRequestEvent);
-
-exports.binding = binding.generate();