Try dynamically creating the link and call its click method.
function openTab(url) { var a = document.createElement('a'); a.href = url; a.target='_blank'; a.click(); }
Then you can call this function as follows:
openTab('http://google.com');
Update
The previous example opens the link in the default browser (which may be something other than Chrome)
If you want to force the link to open in chrome, use window.open
window.open('http://google.com');
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