Whis didn't give a damn about Frieza, and Beerus was happy Frieza helped their universe survive.
The funny thing is had Whis not used his powers to bring Frieza back to life, he'd be screwed. Since Frieza had already been wished back to life with the Earth's Dragon Balls, he wouldn't able to be wished back again.
Imagine how that back and forth between Goku and Frieza
Goku: "Sorry Frieza, can't bring you back to life!"
Frieza: "What do you mean Saiyan? Are you going back on your word?"
Goku: "The Dragon Balls can only bring you back to life once. Since you were already wished back by Shenron, you can't come back again"
Frieza: "WHAT! YOU KNEW THIS AND YOU DIDN'T TELL ME MONKEY!!!
Goku: "No Frieza, I swear! I forgot that you were wished back already, I really did!!!
Frieza: "So all that help I did saving this universe was all for nothing! *sigh* I should have known better than to place my trust in a half-witted, sniveling monkey!"
Goku: Sorry Frieza, I really did try! But hey, if you didn't help us save our universe, you wouldn't be here at all! Hee hee hee"
*Goku proceeds to do that stupid expression he always does*