- Update to 30.0.1553
* Bug and stability fixes
* Includes security update for v8 (bnc821601)
* CVE-2013-2838 Denial of service (out-of-bounds read) via
unspecified vectors

- Add the flag --disable-gpu-sandbox to prevent crashes and/or
slowness. The GPU Sandbox is a new sandbox introduces in M28 and
is currently causing issues
(http://code.google.com/p/chromium/issues/detail?id=255063)