M59: Revert of "Replace homebrew scrollbar in Files app with that of Blink."

ui/file_manager/file_manager/foreground/js/ui/file_table.js

Index: ui/file_manager/file_manager/foreground/js/ui/file_table.js
diff --git a/ui/file_manager/file_manager/foreground/js/ui/file_table.js b/ui/file_manager/file_manager/foreground/js/ui/file_table.js
index b3624e46abbffcae79807ed31e3ec518275a7ba1..54a677a2da36e19485e87c430666a40c4b40ba13 100644
--- a/ui/file_manager/file_manager/foreground/js/ui/file_table.js
+++ b/ui/file_manager/file_manager/foreground/js/ui/file_table.js
@@ -429,6 +429,9 @@ FileTable.decorate = function(
   self.setRenderFunction(self.renderTableRow_.bind(self,
       self.getRenderFunction()));
 
+  self.scrollBar_ = new ScrollBar();
+  self.scrollBar_.initialize(self, self.list);
+
   // Keep focus on the file list when clicking on the header.
   self.header.addEventListener('mousedown', function(e) {
     self.list.focus();