Implement all SkCanvas overrides that SkPictureRecord does.

Primarily this is for isDrawingToLayer().  drawData() and onNewSurface() are
for completeness.

BUG=409138
R=robertphillips@google.com, mtklein@google.com, reed@google.com

Author: mtklein@chromium.org

Review URL: https://codereview.chromium.org/545613002
5 files changed