did you try to use those old bookmarks? They still work on mine. I just tried it. I set Dolphin to be my default browser. Though it does not load when I hit the web button, I put an old bookmark on my home page and hit it. It loaded up on Dolphin. I have disabled chrome so it would not load.
I can add my bookmarks from Chrome. If you do a long press on your home screen, then go to the bookmarks tab, you can drag your bookmark up on to your home screen.
I just tested it and it worked for me. And all my chrome bookmarks were there.