or
https://bugs.webkit.org/show_bug.cgi?id=330408
<rdar://192010252>
A generated GradientImage for a giant box can allocate a giant unaccelerated image, larger than max texture size.
We already restrict ImageBuffer allocations (and downscale) based on MaxClampedArea (4096^2), so this adds a single dimension restriction as well.
MaxClampedArea