I'll add that without fuzzing, it would very hard for us to do things
like switch from a Moz2D backend to another or change the way we do
drawing (like enabling tiling), because these things mean some rounding
happens in slightly different ways and anti-aliasing is particularly
sensitive to this. F
Many Webkit layout tests use DRT (DumpRenderTree), which dumps the layout
object tree and compares against reference text files. These became
difficult to maintain as the layout engine evolved and such tests are not
portable to any other engine. Testing display list dumps sounds like it
would have
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