Files App: Update the context menu when installed app is changed.

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

Index: ui/file_manager/file_manager/foreground/js/task_controller_unittest.js
diff --git a/ui/file_manager/file_manager/foreground/js/task_controller_unittest.js b/ui/file_manager/file_manager/foreground/js/task_controller_unittest.js
index b93e58d2da82f0e819a199af59ee5ff753cb4e36..34abed078a1547f1c15cec3fa9bb8dfdf4506a0f 100644
--- a/ui/file_manager/file_manager/foreground/js/task_controller_unittest.js
+++ b/ui/file_manager/file_manager/foreground/js/task_controller_unittest.js
@@ -34,7 +34,10 @@ function testExecuteEntryTask(callback) {
         {taskId:'handler-extension-id|file|open', isDefault: false},
         {taskId:'handler-extension-id|file|play', isDefault: true}
       ]), 0);
-    }
+    },
+    onAppsUpdated: {
+      addListener: function() {},
+    },
   };
 
   var fileSystem = new MockFileSystem('volumeId');