solution for Public key for google-chrome-stable_current_i386.rpm is not installed:
1. Download Google Chrome on your Fedora PC/Server.
2. Locate the googel chrome rpm file on Download directory.
3. Execute yum command as show below to install google chrome without Public key check...
[root@linux Downloads]# yum -y --nogpgcheck localinstall google-chrome-stable_current_i386.rpm
4. Please note that yum will install all require rpm file in order to install google chrome (dependencies package)