adblockpluschrome: Fix popup origin check when running on adblockplus.org

firstRun.js

 var backgroundPage = chrome.extension.getBackgroundPage();
 var require = backgroundPage.require;
 var Prefs = require("prefs").Prefs;
 var Utils = require("utils").Utils;
 
+function extractBaseUrl(url)
+{
+  return url.split("/").slice(0, 3).join("/");
+}
+
 function openSharePopup(url)
 {
   var iframe = document.getElementById("share-popup");
   var glassPane = document.getElementById("glass-pane");
   var popupMessageReceived = false;
 
   var popupMessageListener = function(event)
   {
-    if (event.origin !== url)
+    if (event.origin !== extractBaseUrl(url))

[Wladimir Palant, 2012/10/26 10:45:48]

How about new backgroundPage.URI(url).prePath?

       return;
 
     iframe.width = event.data.width;
     iframe.height = event.data.height;
     popupMessageReceived = true;
     window.removeEventListener("message", popupMessageListener);
   };
   window.addEventListener("message", popupMessageListener, false);
 
   var popupLoadListener = function()
@@ skipping 89 matching lines @@
     }
   }
 }
 
 function getDocLink(page, anchor)
 {
   return Prefs.documentation_link
               .replace(/%LINK%/g, page)
               .replace(/%LANG%/g, Utils.appLocale) + (anchor ? "#" + anchor : "");
 }