Redraw duing mouse drag

Change-Id: I3d72395ad6e8212859a8a3839211f73d27524f22
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/443413
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Mike Reed <reed@google.com>
1 file changed