Remove unused var.

chrome/renderer/resources/extensions/web_view_experimental.js

 // Copyright 2013 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 extension to provide permission request API (and possibly other future
 // experimental APIs) for <webview> tag.
 // See web_view.js for details.
 //
 // We want to control the permission API feature in <webview> separately from
 // the <webview> feature itself. <webview> is available in stable channel, but
 // permission API would only be available for channels CHANNEL_DEV and
 // CHANNEL_CANARY.
 
 var CreateEvent = require('webView').CreateEvent;
 var MessagingNatives = requireNative('messaging_natives');
-var WebRequestEvent = require('webRequestInternal').WebRequestEvent;
-var WebRequestSchema =
-    requireNative('schema_registry').GetSchema('webRequest');
 var WebViewInternal = require('webView').WebViewInternal;
 var WebView = require('webView').WebView;
 
 var WEB_VIEW_EXPERIMENTAL_EVENTS = {
   'dialog': {
     cancelable: true,
     customHandler: function(webViewInternal, event, webViewEvent) {
       webViewInternal.handleDialogEvent_(event, webViewEvent);
     },
     evt: CreateEvent('webview.onDialog'),
@@ skipping 145 matching lines @@
   };
 
   proto.isUserAgentOverridden = function() {
     return this.internal_(secret).isUserAgentOverridden_();
   };
 
   proto.setUserAgentOverride = function(userAgentOverride) {
     this.internal_(secret).setUserAgentOverride_(userAgentOverride);
   };
 };