google-compute-engine-selenium

1. Go to your cloud console compute engine
2. create a new instance of VM, you can simply use default settings. this should be a Debian image
3. ssh into your instance after it's been setup
4. issue the following commands:

wget https://raw.githubusercontent.com/garywu/gae-selenium/master/install.sh && chmod +x install.sh && ./install.sh &&  ./start_headless.sh && ./demo.py

...after about 5 minutes, you should see

browsing with firefox, http://www.python.org
Welcome to Python.org
browsing with chrome, http://www.python.org
Welcome to Python.org

that means you've succeeded.