Compile file_selection and some other Files app files in gyp v2

ui/file_manager/file_manager/foreground/js/dialog_action_controller.js

Index: ui/file_manager/file_manager/foreground/js/dialog_action_controller.js
diff --git a/ui/file_manager/file_manager/foreground/js/dialog_action_controller.js b/ui/file_manager/file_manager/foreground/js/dialog_action_controller.js
index 1ae70f567f174b3325c861709924a807c002cc56..4fe223b9ae4ecc14c6e36afbb46b7e0ea7c88122 100644
--- a/ui/file_manager/file_manager/foreground/js/dialog_action_controller.js
+++ b/ui/file_manager/file_manager/foreground/js/dialog_action_controller.js
@@ -125,7 +125,8 @@ function DialogActionController(
       this.fileTypes_, launchParam.includeAllFiles);
   this.onFileTypeFilterChanged_();
 
-  this.newFolderCommand_ = document.getElementById('new-folder');
+  this.newFolderCommand_ =
+      /** @type {cr.ui.Command} */ (document.getElementById('new-folder'));
   this.newFolderCommand_.addEventListener(
       'disabledChange', this.updateNewFolderButton_.bind(this));
 }
@@ -138,7 +139,8 @@ DialogActionController.prototype.processOKActionForSaveDialog_ = function() {
 
   // If OK action is clicked when a directory is selected, open the directory.
   if (selection.directoryCount === 1 && selection.fileCount === 0) {
-    this.directoryModel_.changeDirectoryEntry(selection.entries[0]);
+    this.directoryModel_.changeDirectoryEntry(
+        /** @type {!DirectoryEntry} */ (selection.entries[0]));
     return;
   }