[File Manager] Removing a debug change

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

 // Copyright (c) 2012 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.
 
 /**
  * FileManager constructor.
  *
  * FileManager objects encapsulate the functionality of the file selector
  * dialogs, as well as the full screen file manager application (though the
  * latter is not yet implemented).
@@ skipping 2469 matching lines @@
           }
         }
         callback(urls);
       }.bind(this));
     } else {
       callback(urls);
     }
   };
 
   FileManager.prototype.isOffline = function() {
-    return !!navigator.onLine;
+    return !navigator.onLine;
   };
 
   FileManager.prototype.onOnlineOffline_ = function() {
     if (this.isOffline()) {
       console.log('OFFLINE');
       this.dialogContainer_.setAttribute('offline', true);
     } else {
       console.log('ONLINE');
       this.dialogContainer_.removeAttribute('offline');
     }
@@ skipping 1727 matching lines @@
 
       handleSplitterDragEnd: function(e) {
         Splitter.prototype.handleSplitterDragEnd.apply(this, arguments);
         this.ownerDocument.documentElement.classList.remove('col-resize');
       }
     };
 
     customSplitter.decorate(splitterElement);
   };
 })();