Fyrd/caniuse — pull request #247 by MayhemYDG (2013-07-01 08:57:44+00:00)
Title: Chrome 30 supports animated webp.

https://chromium.googlesource.com/chromium/blink/+/f90296206257f574551b4d59d65479ce9716f787

You can downloads tools that contains a gif2webp converter if you want to test:
https://code.google.com/p/webp/downloads/list