[Manishearth]

Integrating layout is a lot more challenging.

Now, once stylo and webrender are in play, ideally layout can just fit in between. All the interfacing already exists from Servo.

However, there are a lot more things in Firefox that talk to layout. This would need work, more work than Stylo.

But this isn't the major issue. The major issue is that Servo's layout has a lot of missing pieces, a lot more than was the case with its style system. It's hard to incrementally replace layout the way webrender did with rendering (fall back when you can't render, render to texture, include it).

So it's doable, but a lot more work.