Align whitelisting behavior in Chrome with Firefox

webrequest.js

Index: webrequest.js
===================================================================
--- a/webrequest.js
+++ b/webrequest.js
@@ -12,17 +12,17 @@ var frames = {};
 
 function onBeforeRequest(details)
 {
   if (details.tabId == -1)
     return {};
 
   var type = details.type;
   if (type == "main_frame" || type == "sub_frame")
-    recordFrame(details.tabId, details.frameId, details.parentFrameId, details.url, type == "main_frame");
+    recordFrame(details.tabId, details.frameId, details.parentFrameId, details.url);
 
   if (type == "main_frame")
     return {};
 
   // Type names match Mozilla's with main_frame and sub_frame being the only exceptions.
   if (type == "sub_frame")
     type = "SUBDOCUMENT";
   else
@@ -56,17 +56,17 @@ function onBeforeSendHeaders(details)
     {
       headers.push({name: "DNT", value: "1"});
       return {requestHeaders: headers};
     }
   }
   return null;
 }
 
-function recordFrame(tabId, frameId, parentFrameId, frameUrl, isMain)
+function recordFrame(tabId, frameId, parentFrameId, frameUrl)
 {
   if (!(tabId in frames))
     frames[tabId] = {};
   frames[tabId][frameId] = {url: frameUrl, parent: parentFrameId};
 }
 
 function getFrameUrl(tabId, frameId)
 {