Mark 'download' permissionrequest stable for <webview>.

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 WebRequestEvent = require('webRequestInternal').WebRequestEvent;
 var webRequestSchema =
     requireNative('schema_registry').GetSchema('webRequest');
 var WebView = require('webView').WebView;
 
 /**
  * @private
  */
 WebView.prototype.maybeSetupExperimentalAPI_ = function() {
   this.setupWebRequestEvents_();
   this.setupDialogEvent_();
 };
 
 /**
  * @private
  */
-WebView.prototype.maybeGetExperimentalPermissionTypes_ = function() {
-  var PERMISSION_TYPES = ['download'];
-  return PERMISSION_TYPES;
-};
-
-/**
- * @private
- */
 WebView.prototype.setupWebRequestEvents_ = function() {
   var self = this;
   // Populate the WebRequest events from the API definition.
   for (var i = 0; i < webRequestSchema.events.length; ++i) {
     Object.defineProperty(self.webviewNode_,
                           webRequestSchema.events[i].name, {
       get: function(webRequestEvent) {
         return function() {
           if (!self[webRequestEvent.name + '_']) {
             self[webRequestEvent.name + '_'] =
@@ skipping 95 matching lines @@
           onTrackedObjectGoneWithRequestId);
       browserPluginNode['-internal-trackObjectLifetime'](dialog, requestId);
     } else {
       actionTaken = true;
       // The default action is equivalent to canceling the dialog.
       browserPluginNode['-internal-setPermission'](requestId, false, '');
       showWarningMessage(detail.messageType);
     }
   });
 };