UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.100 Safari/537.36

Steps to reproduce the problem:
1. Build chrome on a non X11 system (wayland only) or embedded 
2. build will fail on  obj/chrome/browser/ui/libgtkui/libgtk3ui/x11_input_method_context_impl_gtk.o
3. 

What is the expected behavior?
libGTK3 is supposed not to be depending anymore on X11, it can run on wayland or other display servers. I have successfully built it on the same system without X11.

I suppose those modules should not be built by default and / or replaced by an equivalent module that would run on other display managers.

What went wrong?
 obj/chrome/browser/ui/libgtkui/libgtk3ui/x11_input_method_context_impl_gtk.o includes X11 headers and they are not necessarily there

Did this work before? N/A 

Chrome version: 61.0.3163.100  Channel: n/a
OS Version: Ubuntu 17.10
Flash Version: