Return summaries of all layers for display

Bug: skia:9752
Change-Id: I1012f4cda1c28d446269f0a3f212ccf80f17c194
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/267439
Commit-Queue: Nathaniel Nifong <nifong@google.com>
Reviewed-by: Kevin Lubick <kjlubick@google.com>
3 files changed