SkPDF: use RasterClip and Region less.

  * GraphicStackState::updateClip() uses device bounds, not region bounds
  * SkPDFDevice::handleInversePath() uses clipstack, not rasterclip

Rendered PDF Changes: unnoticable.

Change-Id: Ibf9c169a5ada828c8fefedf2bcb37f6de34f3528
Reviewed-on: https://skia-review.googlesource.com/8885
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>
1 file changed