refactored tabs/context code

platform/chromium/vapi-background.js

@@ -705,7 +705,8 @@ vAPI.onLoadAllCompleted = function() {
         var i = tabs.length, tab;
         while ( i-- ) {
             tab = tabs[i];
-            µb.bindTabToPageStats(tab.id, tab.url);
+            µb.tabContextManager.commit(tab.id, tab.url);
+            µb.bindTabToPageStats(tab.id);
             // https://github.com/chrisaljoudi/uBlock/issues/129
             scriptStart(tab.id);
         }