This pop up turns my whole screen gray and freezes chrome. The pop up states, "congratulations you have won a $1000. gift card click here to claim your prize" I did not go there. I had this problem and had to trash chrome to get out of it and reinstall the program from apples app store. I restarted chrome cleaned out all of my browsing history but there is one item left.It is labeled "congrats" with what looks like a piece of paper with the edge bent over.I do believe this is the problem is there any way of removing it from my chrome account on my ipad.