Restore legacy SaveLayerRec ctor

Let's not break existing clients.

Change-Id: I056fefefb49d46fb284597c5bcf0319470537524
Reviewed-on: https://skia-review.googlesource.com/14829
Reviewed-by: Leon Scroggins <scroggo@google.com>
Commit-Queue: Florin Malita <fmalita@chromium.org>
1 file changed