This is an easy one
Create the following file
/etc/yum.repos.d/chromium.repo
With the following contents
[fedora-chromium]
name=Chromium web browser and deps
baseurl=http://repos.fedorapeople.org/repos/spot/chromium/fedora-$releasever/$basearch/
enabled=1
gpgcheck=0
Then run the following
yum update
yum install chromium