Convert delete.js to use async-await.

Bug: 909056
Change-Id: I921d0807bf9cf84874664ab89e9a68a60aca4cd5
Reviewed-on: https://chromium-review.googlesource.com/c/1355022Reviewed-by: Luciano Pacheco <lucmult@chromium.org>
Commit-Queue: Sam McNally <sammc@chromium.org>
Cr-Commit-Position: refs/heads/master@{#612455}

ui/file_manager/integration_tests/file_manager/delete.js

 // Copyright 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.
-
 /**
  * Tests that the Delete menu item is disabled if no entry is selected.
  */
-testcase.deleteMenuItemNoEntrySelected = function() {
+testcase.deleteMenuItemNoEntrySelected = async function() {
   const contextMenu = '#file-context-menu:not([hidden])';
 
-  testPromise(setupAndWaitUntilReady(null, RootPath.DOWNLOADS).then(
-      function(results) {
-        var windowId = results.windowId;
+  const {appId} = await setupAndWaitUntilReady(null, RootPath.DOWNLOADS);
+
   // Right click the list without selecting an entry.
-        return remoteCall
-            .callRemoteTestUtil('fakeMouseRightClick', windowId, ['list.list'])
-            .then(function(result) {
-              chrome.test.assertTrue(!!result, 'fakeMouseRightClick failed');
+  chrome.test.assertTrue(
+      !!await remoteCall.callRemoteTestUtil(
+          'fakeMouseRightClick', appId, ['list.list']),
+      'fakeMouseRightClick failed');
+
   // Wait until the context menu is shown.
-              return remoteCall.waitForElement(windowId, contextMenu);
-            })
-            .then(function() {
+  await remoteCall.waitForElement(appId, contextMenu);
+
   // Assert the menu delete command is disabled.
   const deleteDisabled = '[command="#delete"][disabled="disabled"]';
-              return remoteCall.waitForElement(
-                  windowId, contextMenu + ' ' + deleteDisabled);
-            });
-      }));
+  await remoteCall.waitForElement(appId, contextMenu + ' ' + deleteDisabled);
 };
 
 /**
  * Tests deleting an entry using the toolbar.
  */
-testcase.deleteEntryWithToolbar = function() {
+testcase.deleteEntryWithToolbar = async function() {
   var beforeDeletion = TestEntryInfo.getExpectedRows([
     ENTRIES.photos,
     ENTRIES.hello,
     ENTRIES.world,
     ENTRIES.desktop,
-      ENTRIES.beautiful
+    ENTRIES.beautiful,
   ]);
 
   var afterDeletion = TestEntryInfo.getExpectedRows([
     ENTRIES.photos,
     ENTRIES.hello,
     ENTRIES.world,
-      ENTRIES.beautiful
+    ENTRIES.beautiful,
   ]);
 
-  testPromise(setupAndWaitUntilReady(null, RootPath.DOWNLOADS).then(
-      function(results) {
-        var windowId = results.windowId;
+  const {appId} = await setupAndWaitUntilReady(null, RootPath.DOWNLOADS);
+
   // Confirm entries in the directory before the deletion.
-        return remoteCall
-            .waitForFiles(
-                windowId, beforeDeletion, {ignoreLastModifiedTime: true})
-            .then(function() {
+  await remoteCall.waitForFiles(
+      appId, beforeDeletion, {ignoreLastModifiedTime: true});
+
   // Select My Desktop Background.png
-              return remoteCall.callRemoteTestUtil(
-                  'selectFile', windowId, ['My Desktop Background.png']);
-            })
-            .then(function(result) {
-              chrome.test.assertTrue(result);
+  chrome.test.assertTrue(await remoteCall.callRemoteTestUtil(
+      'selectFile', appId, ['My Desktop Background.png']));
+
+
   // Click delete button in the toolbar.
-              return remoteCall.callRemoteTestUtil(
-                  'fakeMouseClick', windowId, ['button#delete-button']);
-            })
-            .then(function(result) {
-              chrome.test.assertTrue(result);
+  chrome.test.assertTrue(await remoteCall.callRemoteTestUtil(
+      'fakeMouseClick', appId, ['button#delete-button']));
+
+
   // Confirm that the confirmation dialog is shown.
-              return remoteCall.waitForElement(
-                  windowId, '.cr-dialog-container.shown');
-            })
-            .then(function() {
+  await remoteCall.waitForElement(appId, '.cr-dialog-container.shown');
+
   // Press delete button.
-              return remoteCall.callRemoteTestUtil(
-                  'fakeMouseClick', windowId, ['button.cr-dialog-ok']);
-            })
-            .then(function(result) {
-              chrome.test.assertTrue(!!result, 'fakeMouseClick failed');
+  chrome.test.assertTrue(
+      !!await remoteCall.callRemoteTestUtil(
+          'fakeMouseClick', appId, ['button.cr-dialog-ok']),
+      'fakeMouseClick failed');
+
   // Confirm the file is removed.
-              return remoteCall.waitForFiles(
-                  windowId, afterDeletion, {ignoreLastModifiedTime: true});
-            });
-      }));
+  await remoteCall.waitForFiles(
+      appId, afterDeletion, {ignoreLastModifiedTime: true});
 };