Chrome: 60.0.3074.0
CrOS: 9452.0.0
ARC: ToT as of 4/14
device:  caroline

[16581:16581:0417/065559.359132:FATAL:mojo_frame_sink_manager.cc(114)] Check failed: surface_info.device_scale_factor() > 0.0f (0 vs. 0)

Repro step:
1) Apply this patch (https://codereview.chromium.org/2816413003/)
2) Setup simple_chrome for caroline.
3) Add dcheck_always_on to GN_ARGS, run "gn args" with this args, build & deploy to caroline

not sure if this is serious. fsamuel@ can you take a look?