Make downloads list keyboard shortcuts more consistent.

chrome/browser/resources/downloads/downloads.html

Index: chrome/browser/resources/downloads/downloads.html
diff --git a/chrome/browser/resources/downloads/downloads.html b/chrome/browser/resources/downloads/downloads.html
index 661308aa48536f94d2d9f9fdc98dcf861918b213..4749df3b5cc038f1f9c843eac26af4854020c795 100644
--- a/chrome/browser/resources/downloads/downloads.html
+++ b/chrome/browser/resources/downloads/downloads.html
@@ -7,9 +7,14 @@
   <!-- This has to come after chrome_shared.css -->
   <link rel="stylesheet" href="downloads.css">
   <script src="chrome://resources/js/action_link.js"></script>
+  <script src="chrome://resources/js/assert.js"></script>
   <script src="chrome://resources/js/cr.js"></script>
   <script src="chrome://resources/js/cr/ui.js"></script>
   <script src="chrome://resources/js/cr/ui/command.js"></script>
+  <script src="chrome://resources/js/cr/ui/focus_grid.js"></script>
+  <script src="chrome://resources/js/cr/ui/focus_manager.js"></script>
+  <script src="chrome://resources/js/cr/ui/focus_row.js"></script>
+  <script src="chrome://resources/js/event_tracker.js"></script>
   <script src="chrome://resources/js/load_time_data.js"></script>
   <script src="chrome://resources/js/util.js"></script>
   <script src="chrome://downloads/downloads.js"></script>