Wrap built-in symbol tables during inlining.

This is conceptually very similar to http://review.skia.org/328384, but
the inliner doesn't use `clone()` when it clones a node.

Change-Id: I7456b63687ce2f93a7980fb101dfc97e143a378f
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/328817
Commit-Queue: John Stiles <johnstiles@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
1 file changed