Open address : https://aur.archlinux.org/packages/google-chrome/
in the right side you will find Package Actions
Download tarball.
Extract the tarball.
Open this location on terminal (konsole).
Type : makepkg
[ This command executes the file PKGBUILD, if you are interested in what it does then simply open the
file and look at the commands. They are simple to understand and you may run those commands directly
on the terminal doing the same process by yourself.]
as root : pacman -U google-chrome-stable....pkg.tar.xz
[ makepkg command will build a .pkg.tar.xz file which may be used to install the software using the command written above.]
or
makepkg -i
This should get your chrome installed.