[Files.app] Split the JavaScript files into subdirectories: common, background, and foreground

chrome/browser/resources/file_manager/foreground/js/suggest_apps_dialog.js

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 'use strict';
 
 /**
  * SuggestAppsDialog contains a list box to select an app to be opened the file
  * with. This dialog should be used as action picker for file operations.
  */
@@ skipping 398 matching lines @@
       result = SuggestAppsDialog.Result.USER_CANCELL;
       break;
     default:
       result = SuggestAppsDialog.Result.USER_CANCELL;
       console.error('Invalid state.');
   }
   this.state_ = SuggestAppsDialog.State.UNINITIALIZED;
 
   this.onDialogClosed_(result);
 };