Restore Undo option in password manager

Bug: 1006749
Change-Id: I74334514acd6fd195e6cc435e37e5b46731ea4a2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1819306Reviewed-by: Hector Carmona <hcarmona@chromium.org>
Commit-Queue: Tomasz Moniuszko <tmoniuszko@opera.com>
Cr-Commit-Position: refs/heads/master@{#699229}

chrome/browser/resources/settings/autofill_page/passwords_section.js

@@ -426,7 +426,9 @@ Polymer({
   onMenuRemovePasswordTap_: function() {
     this.passwordManager_.removeSavedPassword(
         this.activePassword.item.entry.id);
-    cr.toastManager.getInstance().show(this.i18n('passwordDeleted'), false);
+    cr.toastManager.getInstance().show(
+        this.i18n('passwordDeleted'),
+        /* showUndo */ true);
     /** @type {CrActionMenuElement} */ (this.$.menu).close();
   },