If you're tossing them into the secondary, you've probably got enough alcohol already built up that what's on the chips isn't gonna harm the beer. It's like adding fruit or dry hopping. If it makes you feel better then hey, go for it. Or you could probably freeze the chips till you need them.
Got an IPILSA that I'm drinking now, a spreed brew brown ale sitting for St Patty's day, and a Porter in the fermenter that's getting entered into the Sam Adams Longshot competition.
I'd like to try getting an oak barrel and age a barley wine in it.