Linking axes or using addlistener

I have two x axes associated with the same y data. It looks like this:

x1 = 1:10; 
x2 = 10*x1; 
y = x1.^2; 

subplot(211) 
plot(x1,y) 
ax1 = gca; 

subplot(212) 
plot(x2,y)
ax2 = gca;

The second set of x axes are 10 times x1. I'd like to do something like linkaxes because I want to be able to zoom in on the first subplot and have the second subplot limits update automatically. It seems simple, but I can't quite figure out how to do it. addlistener seems like it might be the ticket, but the documentation doesn't make clear how I could use it for this simple task.