Every time I open chrome it directs me to a porn site, how do I remove.

[AC Question]

I have already cleared browsing history, did not help.

 

[Ian Morgan2]

Try clearing Chrome's cache....Take a look at your Settings, and for Cookies ( do you allow third party cookies ?). Check thro' All sites at the top and Storage at the bottom.....if you see any "UFOs" delete !
Another thing you could try, is an install of Adblock....if you go to Settings, are you forbidding apps from unknown sources ? You could try installing Chrome Beta or Dev.....either run alongside Chrome Stable....see if the problem still manifests itself.
If you still have the issue after that, look at a factory reset.