Re-focus browser elements after changing their remote attribute (bug 925058, r=felipe).

browser/base/content/tabbrowser.xml

@@ -1341,6 +1341,8 @@
             if (isRemote == aRemote)
               return false;
 
+            let wasActive = document.activeElement == aBrowser;
+
             // Unhook our progress listener.
             let tab = this._getTabForBrowser(aBrowser);
             let index = tab._tPos;
@@ -1361,6 +1363,9 @@
             else
               tab.removeAttribute("remote");
 
+            if (wasActive)
+              aBrowser.focus();
+
             return true;
           ]]>
         </body>