Kill bad apps.

chrome/test/data/extensions/platform_apps/app_view/guest_app/background.js

+// Copyright (c) 2015 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.app.runtime.onLaunched.addListener(function() {
+  chrome.app.window.create("window.html", {}, function() {
+  });
+});
+
+
+chrome.app.runtime.onEmbedRequested.addListener(function(request) {
+  console.log('Embed request received at the guest app.');
+  window.request = request;
+  chrome.test.sendMessage('AppViewTest.EmbedRequested', function(response) {
+    continueEmbedding();
+  });
+});
+
+function continueEmbedding() {
+  console.log('Moving on with the embedding.');
+  if (window.request) {
+    request.allow('window.html');
+  }
+}
+