permissionrequest API for guest Download.

chrome/test/data/extensions/platform_apps/web_view/download/embedder.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.
+
+var embedder = {};
+embedder.baseGuestURL = '';
+embedder.guestURL = '';
+
+/** @private */
+embedder.setUpGuest_ = function() {
+  document.querySelector('#webview-tag-container').innerHTML =
+      '<webview style="width: 100px; height: 100px;"' +
+      ' src="' + embedder.guestURL + '"' +
+      '></webview>';
+  var webview = document.querySelector('webview');
+  if (!webview) {
+    chrome.test.fail('No <webview> element created');
+    return null;
+  }
+
+  webview.addEventListener('permissionrequest', function(e) {
+    if (e.permission == 'download') {
+      var url = e.url;
+      if (url.indexOf('expect-deny.zip') != -1) {
+        e.request.deny();
+      } else if (url.indexOf('expect-allow.zip') != -1) {
+        e.request.allow();
+      } else {
+        // Ignore.
+      }
+    }
+  });
+  return webview;
+};
+
+onload = function() {
+  chrome.test.getConfig(function(config) {
+    embedder.baseGuestURL = 'http://localhost:' + config.testServer.port;
+    embedder.guestURL = embedder.baseGuestURL +
+        '/files/extensions/platform_apps/web_view/download/guest.html';
+    embedder.setUpGuest_();
+  });
+};