What causes the strange lines in Chrome on a Macbook Pro?
If it was only happening in Chrome, I would have suggested uninstalling and reinstalling Chrome. I would have also suggested that you use Safari and see if you get the same issues.
Not sure how the PRAM would affect this 1 program and not others. If you set any kinds of flags in Chrome(link works in chrome only) then I would hit the Reset All on the flags page and restart the browser.