New tabs containing questionable sites/malware warnings etc. keep popping up unsolicited on Chrome on my Samsung 7 mobile phone. Sometimes as many as 10+ in an hour. Sometimes I can be using a different app and I will automatically be redirected to a new unsolicited web page in Chrome. I have tried everything including clearing cache etc. and various antivirus/malware scans. Even cleared nonessential apps from my phone. Would like to uninstall and reinstall Chrome, but understand that's not possible. Any ideas?