[Chrome Apps] Test open new window with file not found.

Add a new Chrome Apps test. It tries to open a new window using
chrome.app.window.create() with a file that does not exist.
The callback must be called with createdWindow == undefined.

Bug: 820995
Change-Id: Iaffe9373e2f19f30d473f3bd165c1a2822f85073
Reviewed-on: https://chromium-review.googlesource.com/986437
Commit-Queue: Arthur Sonzogni <arthursonzogni@chromium.org>
Reviewed-by: Ben Wells <benwells@chromium.org>
Cr-Commit-Position: refs/heads/master@{#548736}

chrome/browser/apps/app_browsertest.cc

@@ -1399,6 +1399,11 @@ IN_PROC_BROWSER_TEST_F(PlatformAppBrowserTest, AppWindowIframe) {
                            "APP_WINDOW_CREATE_CALLBACK");
 }
 
+IN_PROC_BROWSER_TEST_F(PlatformAppBrowserTest, NewWindowWithNonExistingFile) {
+  ASSERT_TRUE(
+      RunPlatformAppTest("platform_apps/new_window_with_non_existing_file"));
+}
+
 IN_PROC_BROWSER_TEST_F(PlatformAppBrowserTest, SandboxedLocalFile) {
   ASSERT_TRUE(RunPlatformAppTest("platform_apps/sandboxed_local_file"));
 }

chrome/test/data/extensions/platform_apps/new_window_with_non_existing_file/manifest.json

+{
+  "name": "Platform App Test: Use chrome.app.window.create() with an non existing file.",
+  "manifest_version": 2,
+  "version": "1",
+  "app": {
+    "background": {
+      "scripts": ["test.js"]
+    }
+  }
+}

chrome/test/data/extensions/platform_apps/new_window_with_non_existing_file/test.js

+// Copyright (c) 2018 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('not_found.html', {}, function (createdWindow) {
+    if (createdWindow)
+      chrome.test.notifyFail();
+    else
+      chrome.test.notifyPass();
+  })
+});