Add missing includes to media players.

chrome/browser/resources/file_manager/video_player.html

Index: chrome/browser/resources/file_manager/video_player.html
diff --git a/chrome/browser/resources/file_manager/video_player.html b/chrome/browser/resources/file_manager/video_player.html
index a039aff6867cb5dab5c5ebf2414e7b2d056a48ef..812f2b4dec9825d709f5dc5f3a109e2dbba38ec6 100644
--- a/chrome/browser/resources/file_manager/video_player.html
+++ b/chrome/browser/resources/file_manager/video_player.html
@@ -23,6 +23,9 @@
     <!-- This section is used when the file manager is loaded with
          'filemgr-ext-path' command-line flag. -->
     <!-- Keep the list in sync with video_player_scripts.js. -->
+    <script src="chrome://resources/js/cr.js"></script>
+    <script src="chrome://resources/js/cr/event_target.js"></script>
+    <script src="chrome://resources/js/cr/ui/array_data_model.js"></script>
     <script src="chrome://resources/js/load_time_data.js"></script>
 
     <script src="js/async_util.js"></script>