We'd like this to get coverage of the new BasicCompositor. This should be identical to the current Ripc testsuite, except with the pref 'layers.offmainthreadcomposition.prefer-basic' set to true. This test suite should be green, once bug 879149 lands. https://tbpl.mozilla.org/?tree=Try&rev=ad75e0a7e7fd
We probably only want/need coverage on linux opt builds (same as we have un-hidden for the current Ripc suite).
Fixed this using bug 885573 instead.