Only disallow top-level navigations in platform apps

chrome/test/data/extensions/platform_apps/iframes/main.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.
+
+chrome.test.getConfig(function(config) {
+  var LOCAL_URL = 'local-iframe.html';
+  var DATA_URL = 'data:text/plain,This frame should be displayed.';
+  var REMOTE_URL = 'http://localhost:' + config.testServer.port
+      '/files/extensions/platform_apps/iframes/remote-iframe.html';
+
+  chrome.test.runTests([
+    function localIframe() {
+      var iframe = document.createElement('iframe');
+      iframe.onload = chrome.test.callbackPass(function() {
+        console.log('Local iframe loaded');
+      });
+      iframe.src = LOCAL_URL;
+      document.body.appendChild(iframe);
+    },
+
+    function dataUrlIframe() {
+      var iframe = document.createElement('iframe');
+      iframe.onload = chrome.test.callbackPass(function() {
+        console.log('data: URL iframe loaded');
+      });
+      iframe.src = DATA_URL;
+      document.body.appendChild(iframe);
+    },
+
+    function remoteIframe() {
+      var iframe = document.createElement('iframe');
+      iframe.onload = function() {
+        chrome.test.notifyFail('Remote iframe should not have loaded');
+      };
+      iframe.src = REMOTE_URL;
+      document.body.appendChild(iframe);
+
+      // Load failure should happen synchronously, but wait a bit before
+      // declaring success.
+      setTimeout(chrome.test.succeed, 500);
+    }
+  ]);
+});