bug 51756, r=pinkerton, only pass in ONE 'security-button' DOM element

extensions/psm-glue/res/content/securityUI.js

@@ -32,9 +32,8 @@ function SetSecurityButton()
     securityUI = ui.QueryInterface(Components.interfaces.nsSecureBrowserUI);
 
     var button  = document.getElementById('security-button');
-    var certAuth = document.getElementById('security-button');
 	if (button && window._content)
-		securityUI.init(window._content, button, certAuth);
+		securityUI.init(window._content, button);
 }
 
 function displayPageInfo()