Integrate ListThumbnailLoader to list view and grid view.

ui/file_manager/file_manager/main.html

Index: ui/file_manager/file_manager/main.html
diff --git a/ui/file_manager/file_manager/main.html b/ui/file_manager/file_manager/main.html
index 30ba211cc4e8c1f72dd00a911b43b31b2a06feda..1325450aa7fddb137aa7e3f73b7750b64312c9cf 100644
--- a/ui/file_manager/file_manager/main.html
+++ b/ui/file_manager/file_manager/main.html
@@ -139,6 +139,7 @@
       <script src="foreground/js/task_controller.js"></script>
       <script src="foreground/js/toolbar_controller.js"></script>
       <script src="foreground/js/thumbnail_loader.js"></script>
+      <script src="foreground/js/list_thumbnail_loader.js"></script>
       <script src="foreground/js/ui/banners.js"></script>
       <script src="foreground/js/ui/conflict_dialog.js"></script>
       <script src="foreground/js/ui/default_action_dialog.js"></script>