SkPDF: simplify SkPDFDevice::drawPaint.

Now just calls drawRect with the current clip's bounding box.  This
might be slightly more efficient for the rasterizer.  Deletes  20 lines
of code, making things more maintainable.  remove internalDrawPaint().

Of 702 test images:
    692 produced identical results.
    19 produced slightly different PDFs that render identically.
    1 rendered impoerceptable differently in perspective.

Change-Id: I5539e58c8a27ead461922a04f2518daa1c7995ba
Reviewed-on: https://skia-review.googlesource.com/156366
Commit-Queue: Ben Wagner <bungeman@google.com>
Auto-Submit: Hal Canary <halcanary@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
2 files changed