Handling file actions in only one instance of file manager.

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 1828 matching lines @@
       // when mounts location will be decided.
       if (rescanDirectoryNeeded)
         self.rescanDirectory_(null, 300);
     });
   };
 
   /**
    * Event handler called when some internal task should be executed.
    */
   FileManager.prototype.onFileTaskExecute_ = function(id, details) {
+    // Each instance of the file manager receives the event. But it must be
+    // handled once. Let's it be the first instance in the list returned by

[rginda, 2011/08/31 18:10:03]

s/Let's/Let/

+    // getViews.
+    var windows = chrome.extension.getViews({type: 'tab'});
+    for (var i = 0; i < windows.length; i++) {
+      if ('fileManager' in windows[i]) {

[rginda, 2011/08/31 18:10:03]

This seems hokey.  Any window with a variable called fileManager will trigger
this.  Comparing URLs seems more robust.

+        if (windows[i]['fileManager'] == this) break;

[rginda, 2011/08/31 18:10:03]

Newline and indent before break and return, please.

+        else return;
+      }
+    }
+
     var urls = details.entries.map(function(entry) {
         return entry.toURL();
     });
     if (id == 'preview') {
       g_slideshow_data = urls;
       chrome.tabs.create({url: "slideshow.html"});
     } else if (id == 'edit') {
       this.openImageEditor_(details.entries[0]);
     } else if (id == 'play' || id == 'enqueue') {
       chrome.fileBrowserPrivate.viewFiles(urls, id);
@@ skipping 1407 matching lines @@
 
     if (msg) {
       console.log('no no no');
       this.alert.show(msg, onAccept);
       return false;
     }
 
     return true;
   };
 })();