FilesApp add fileManagerPrivate crostini functions for test.html

Add fileManagerPrivate.isCrostiniEnabled and
fileManagerPrivate.mountCrostiniContainer.

Add paper-progress polymer lib to test.html.

Bug: 834103
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: If90e8005100286229219a9771b488722b0f14275
Reviewed-on: https://chromium-review.googlesource.com/1059098Reviewed-by: Noel Gordon <noel@chromium.org>
Commit-Queue: Joel Hockey <joelhockey@chromium.org>
Cr-Commit-Position: refs/heads/master@{#558658}

ui/file_manager/file_manager/test/js/chrome_file_manager.js

@@ -118,9 +118,16 @@ chrome.fileManagerPrivate = {
   grantAccess: (entryUrls, callback) => {
     setTimeout(callback, 0);
   },
+  isCrostiniEnabled: (callback) => {
+    setTimeout(callback, 0, true);
+  },
   isUMAEnabled: (callback) => {
     setTimeout(callback, 0, false);
   },
+  mountCrostiniContainer: (callback) => {
+    // Simulate startup of vm and container by taking 3s.
+    setTimeout(callback, 3000);
+  },
   onAppsUpdated: {
     addListener: () => {},
   },

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

@@ -133,14 +133,17 @@ scripts += ['<script src="%s"></script>' % s for s in [
 #  * background/js/background_common_scripts.js
 #  * background/js/background_scripts.js
 # into <script> tags in main.html.
-# Add polymer lib at start.
+# Add polymer libs at start.
 bg_scripts = read('background/js/background_scripts.js').split('\n')
 includes2scripts('foreground/js/main_scripts.js')
 includes2scripts('background/js/background_common_scripts.js')
 includes2scripts('background/js/background_scripts.js')
 main_html = replaceline(main_html, 'foreground/js/main_scripts.js', [
     ('<link rel="import" href="../../../third_party/polymer/v1_0/'
-     'components-chromium/polymer/polymer.html">')] + scripts)
+     'components-chromium/polymer/polymer.html">'),
+    ('<link rel="import" href="../../../third_party/polymer/v1_0/'
+     'components-chromium/paper-progress/paper-progress.html">'),
+    ] + scripts)
 
 # Load QuickView in iframe rather than webview.
 # Change references in files_quick_view.html to use updated