Eliminate last vestigages of the command system design.

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

Index: ui/file_manager/file_manager/foreground/js/file_manager.js
diff --git a/ui/file_manager/file_manager/foreground/js/file_manager.js b/ui/file_manager/file_manager/foreground/js/file_manager.js
index a7aed7df8448bc12002b3b089f4ede02a9e3d115..726be4e9724126afe77eee819a7f15a57c0aa508 100644
--- a/ui/file_manager/file_manager/foreground/js/file_manager.js
+++ b/ui/file_manager/file_manager/foreground/js/file_manager.js
@@ -485,14 +485,13 @@ FileManager.prototype = /** @struct */ {
     importer.importEnabled().then(
         function(enabled) {
           if (enabled) {
-            var commandAdapter = new importer.ButtonCommandAdapter(this);
             this.importController_ = new importer.ImportController(
                 new importer.RuntimeControllerEnvironment(this),
                 /** @type {!importer.MediaScanner} */ (
                     this.mediaScanner_),
                 /** @type {!importer.ImportRunner} */ (
                     this.mediaImportHandler_),
-                commandAdapter.update.bind(commandAdapter));
+                new importer.RuntimeCommandWidget());
           }
         }.bind(this));