For openSUSE 13.1 Update ports run the following as root:
zypper addrepo https://download.opensuse.org/repositories/openSUSE:Evergreen:Maintenance:4660/openSUSE_13.1_Update_ports/openSUSE:Evergreen:Maintenance:4660.repo
zypper refresh
zypper install chromium
For openSUSE 13.1 Update run the following as root:
zypper addrepo https://download.opensuse.org/repositories/openSUSE:Evergreen:Maintenance:4660/openSUSE_13.1_Update/openSUSE:Evergreen:Maintenance:4660.repo
zypper refresh
zypper install chromium