Following the established procedure: rename RenderSVGTransformableContainer -> LegacyRenderSVGTransformableContainer. In a follow-up patch RenderSVGTransformableContainer will be reintroduced for LBSE, inheriting from RenderSVGContainer instead of LegacyRenderSVGContainer.
Created attachment 452839 [details] Patch, v1
Created attachment 452841 [details] Patch, v2
Committed r290326 (247648@trunk): <https://commits.webkit.org/247648@trunk>
<rdar://problem/89307626>