SkXPSDevice inherits from SkBaseDevice

Change-Id: I81ed36da33821df36d11806a6349a2ede61c6f73
Reviewed-on: https://skia-review.googlesource.com/7942
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>
3 files changed