For ChromeOS, the device variety is small enough that Ganesh everywhere may indeed be feasible. However, there is one big obstacle on IA ChromeOS, which is MSAA slowness.

Recently, CMAA alternative was landed and latest IA Chromebooks use it on WebGL.

This bug applies CMAA on Accelerated Canvas first, and if the quality is acceptable, apply CMAA on GPU rasterization later.

In the logistic detail, it will introduce --enable-cmaa-gpu-rasterization and it works like --enable-distance-field-text. We will enable it on specific chromebook device and monitor user's perception.