[DevTools] Prepare UI module for closure compiler roll

third_party/WebKit/Source/devtools/front_end/ui/Toolbar.js

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 144 matching lines @@
             }
             if (this._items[i].visible()) {
                 previousIsSeparator = false;
                 lastSeparator = null;
                 nonSeparatorVisible = true;
             }
         }
         if (lastSeparator && lastSeparator !== this._items.peekLast())
             lastSeparator.setVisible(false);
 
-        this.element.classList.toggle("hidden", lastSeparator && lastSeparator.visible() && !nonSeparatorVisible);
+        this.element.classList.toggle("hidden", !!lastSeparator && lastSeparator.visible() && !nonSeparatorVisible);
     }
 }
 
 /**
  * @constructor
  * @extends {WebInspector.Object}
  * @param {!Element} element
  */
 WebInspector.ToolbarItem = function(element)
 {
@@ skipping 781 matching lines @@
 
     /**
      * @return {!Promise}
      */
     onLoad: function()
     {
         return this._promise;
     },
 
     __proto__: WebInspector.Toolbar.prototype
-}
+}