Disable sandboxing in headless Chromium
Disable sandboxing in headless Chromium

Chromium's sandboxing must be properly configured to work.
Its launcher needs to be owned by root and have mode 4755 set.
We don't really need the sandboxing for running tests locally,
so it makes sense to disable it.

This should also hopefully fix Travis. -_-

koute/cargo-web,koute/cargo-web,koute/cargo-web,koute/cargo-web