Put archive file handling support behind a flag for M14.

chrome/browser/resources/file_manager/js/file_manager.js

 // Copyright (c) 2011 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.
 
 // Setting the src of an img to an empty string can crash the browser, so we
 // use an empty 1x1 gif instead.
 const EMPTY_IMAGE_URI = 'data:image/gif;base64,'
         + 'R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw%3D%3D';
 
 var g_slideshow_data = null;
@@ skipping 1629 matching lines @@
               chrome.extension.getURL('images/icon_play_16x16.png');
           task.title = str('PLAY_MEDIA').replace("&", "");
         } else if (task_parts[1] == 'enqueue') {
           task.iconUrl =
               chrome.extension.getURL('images/icon_add_to_queue_16x16.png');
           task.title = str('ENQUEUE');
         } else if (task_parts[1] == 'mount-archive') {
           task.iconUrl =
               chrome.extension.getURL('images/icon_mount_archive_16x16.png');
           task.title = str('MOUNT_ARCHIVE');
+          if (str('ENABLE_ARCHIVES') != 'true')
+            continue;
         }
       }
       this.renderTaskButton_(task);
     }
     this.maybeRenderUnmountTask_(selection);
     // This needs to be done in separate function, as check requires
     // asynchronous function calls.
     this.maybeRenderFormattingTask_(selection);
   };
 
@@ skipping 1488 matching lines @@
 
     if (msg) {
       console.log('no no no');
       this.alert.show(msg, onAccept);
       return false;
     }
 
     return true;
   };
 })();