Ok, you give me the idea and it works. Sometimes need to think more simple.
I just worked
goog.getCssName('icon') + ' ' + goog.getCssName('user')By the way, my application is JavaScript driven one page application. I'm using hash routing and all layout and view is rendered by JavaScript. I have my own template engine solution so I don't need to use Closure Templates. My HTML markups are JavaScript method that returns a string.