Allow platform apps to open links in the browser.

chrome/test/data/extensions/platform_apps/open_link/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 linkNode = document.getElementById('test-link');
+  linkNode.href = 'http://localhost:' + config.testServer.port +
+      '/files/extensions/platform_apps/open_link/link.html';
+
+  var clickEvent = document.createEvent('MouseEvents');
+  clickEvent.initMouseEvent('click', true, true, window,
+                            0, 0, 0, 0, 0, false, false,
+                            false, false, 0, null);
+  linkNode.dispatchEvent(clickEvent);
+});
+
+onmessage = function() {
+  chrome.test.sendMessage('Link opened');
+};