[FilesTS] Convert create_new_folder.js to typescript

Bug: b/319189127
Test: browser_tests --gtest_filter=CreateNewFolder/FilesAppBrowserTest*
Change-Id: I327f2affc94d578714866ba813e9dca9a0a1a027
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5289877
Commit-Queue: Ben Reich <[email protected]>
Reviewed-by: Luciano Pacheco <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1260200}
diff --git a/ui/file_manager/integration_tests/BUILD.gn b/ui/file_manager/integration_tests/BUILD.gn
index e54486f..9874991 100644
--- a/ui/file_manager/integration_tests/BUILD.gn
+++ b/ui/file_manager/integration_tests/BUILD.gn
@@ -13,7 +13,6 @@
   # File Manager.
   "file_manager/background.js",
   "file_manager/context_menu.js",
-  "file_manager/create_new_folder.js",
   "file_manager/crostini.js",
   "file_manager/directory_tree_context_menu.js",
   "file_manager/dlp.js",
@@ -54,7 +53,7 @@
 
   "file_manager/copy_between_windows.ts",
 
-  # "file_manager/create_new_folder.ts",
+  "file_manager/create_new_folder.ts",
 
   # "file_manager/crostini.ts",