Prepare for internal SaveFlags removal.

Chromium has a couple of SkCanvas subclasses which override willSave().
This adds a transitional shim to facilitate converting these to the
parameter-less API.

BUG=skia:2297
R=reed@google.com, scroggo@google.com

Author: fmalita@chromium.org

Review URL: https://codereview.chromium.org/338913002
1 file changed