Auto-Refresh Page for Google Chrome on iPad
Chrome for iPad doesn't have extensions, but you can accomplish what you're looking for (in Chrome or Safari) using a bookmarklet.

I tested Evan Culver's and it works beautifully:

javascript: timeout=prompt("Set timeout [s]"); current=location.href; if(timeout&gt;0) setTimeout('reload()',1000*timeout); else location.replace(current); function reload(){ setTimeout('reload()',1000*timeout); fr4me='&lt;frameset cols=\'*\'&gt;\n&lt;frame src=\''+current+'\'/&gt;'; fr4me+='&lt;/frameset&gt;'; with(document){write(fr4me);void(close())};}

How to install it on Chrome:


On your iPad, copy the above line of in its entirety (starting with javascriptand ending with the final })
In Chrome, create a new bookmark (of any page) by tapping the star icon in the location bar. Next, immediately tap the Edit button in the note that will appear at the bottom of the screen, which will let you edit the new bookmark and turn it into a bookmarklet.
Set the name of the bookmark to "Auto Refresh"
Delete the whole URL and paste the code above in its place. Tap Done to finish creating your bookmarklet.


To use it:


Visit a page you want to refresh
Tap the location bar and type "Auto Refresh". Select the bookmarklet from the drop down options
Choose your refresh interval (in seconds)


Note: this particular bookmarklet doesn't have an option to stop auto-refresh; to do that, just reload the page manually.