Wow. Same thing happen to me. I renamed the original, thinking it was in memory. I was going to move the new one in place but that plan didn't work.
Rebooted into a loop. Only thing I was able to do was use Motos RSD Lite and reflash back to original. Go here: Xoom HRI39 SBF - Xoom Support/General - AllDroid Public Board
. I had a long Friday afternoon.
After restoration, update, root, etc, I was able to copy and overwrite the file. BUT I don't see the effect. Some websites are still in mobile view. I even did the about
:debug thing so make sure the UA string was set to Desktop.