Any way to dismiss "Say hello to your new Chrome browser" in 69?
Solution 1:
I had the same problem and successfully dismissed the annoying dialog by doing sign-out from the profile icon at the top right corner of the newtab page (not the top bar of Chrome) and sign-in again.
Solution 2:
Close Chrome, open Preferences JSON file in profile directory (usually %LocalAppData%\Google\Chrome\User Data\Default\),
Remove this key-value pair "last_known_google_url":"xxxxx", save it.