FilesApp UI test for crostini quickview

* Add quickview test to FileManagerUITest
* Fix error in create_test_main script which was creating
  invalid markup.

Bug: 845830
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: I23b9e587df0ac8e4cdd3a45db4a9faba3f13e7cd
Reviewed-on: https://chromium-review.googlesource.com/1098754Reviewed-by: Luciano Pacheco <lucmult@chromium.org>
Commit-Queue: Joel Hockey <joelhockey@chromium.org>
Cr-Commit-Position: refs/heads/master@{#566791}

chrome/browser/chromeos/file_manager/file_manager_uitest.cc

@@ -65,6 +65,10 @@ IN_PROC_BROWSER_TEST_F(FileManagerUITest, Crostini) {
   RunTest("crostini");
 }
 
+IN_PROC_BROWSER_TEST_F(FileManagerUITest, QuickView) {
+  RunTest("quickview");
+}
+
 IN_PROC_BROWSER_TEST_F(FileManagerUITest, UMA) {
   RunTest("uma");
 }

ui/file_manager/file_manager/test/quick_view.js

@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-'use strict';
-
 const quickview = {};
 
 /**

ui/file_manager/file_manager/test/scripts/create_test_main.py

@@ -101,7 +101,7 @@ main_html = (read('main.html')
              .replace(('chrome-extension://fbjakikfhfdajcamjleinfciajelkpek/'
                        'cws_widget/cws_widget_container.css'),
                       ('../../../components/chrome_apps/'
-                       'webstore_widget/cws_widget/cws_widget_container.css">'))
+                       'webstore_widget/cws_widget/cws_widget_container.css'))
              .split('\n'))
 
 # Fix text_defaults.css.  Copy and replace placeholders.