DevTools: Add JSDoc for static methods, fix JSDoc types and induced errors

Source/devtools/front_end/ui/StatusBarButton.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 432 matching lines @@
 WebInspector.StatusBarButton.Provider.prototype = {
     /**
      * @return {?WebInspector.StatusBarButton}
      */
     button: function() {}
 }
 
 /**
  * @constructor
  * @extends {WebInspector.StatusBarItem}
- * @param {?function(!Event)} changeHandler
+ * @param {?function(?Event)} changeHandler
  * @param {string=} className
  */
 WebInspector.StatusBarComboBox = function(changeHandler, className)
 {
     WebInspector.StatusBarItem.call(this, "span");
     this.element.className = "status-bar-select-container";
 
     this._selectElement = this.element.createChild("select", "status-bar-item");
     this.element.createChild("div", "status-bar-select-arrow");
     if (changeHandler)
@@ skipping 73 matching lines @@
         if (this._selectElement.selectedIndex >= 0)
             return this._selectElement[this._selectElement.selectedIndex];
         return null;
     },
 
     /**
      * @param {!Element} option
      */
     select: function(option)
     {
-        this._selectElement.selectedIndex = Array.prototype.indexOf.call(this._selectElement, option);
+        this._selectElement.selectedIndex = Array.prototype.indexOf.call(/** @type {?} */ (this._selectElement), option);
     },
 
     /**
      * @param {number} index
      */
     setSelectedIndex: function(index)
     {
         this._selectElement.selectedIndex = index;
     },
 
@@ skipping 121 matching lines @@
         var options = [];
         for (var index = 0; index < this._states.length; index++) {
             if (this._states[index] !== this.state && this._states[index] !== this._currentState)
                 options.push(this._buttons[index]);
         }
         return options;
     },
 
     __proto__: WebInspector.StatusBarButton.prototype
 }