Chrome: Synching tabs from my Macs?

I am logged into Chrome on my iPhone using my Gmail account.

1.) How does it know which devices to synch my tabs from? Will it synch open tabs from my iPad, my Macbook Pro, my Macpro, etc.?

2.) I am logged into my Gmail account on my Macbook Pro in Chrome and it is not synching my open tabs to my iPhone, even though I keep refreshing it by clicking the button in the lower right. What am I missing?

Thanks.

 

Ok I figured out that I had to log into Chrome and it worked.

Does anyone know if it will synch open tabs from iOS back to Chrome on my Macs?