SkPDF: Fix Type3 ToUnicode table.
This seems to fix text extraction on Adobe Reader
- Registry/Ordering is now set to Skia/SkiaOrdering.
- Type3 fonts now get a FontDescriptor (force symbolic font).
- CMapName is now Skia-Identity-SkiaOrdering
- CMap behaves correctly for single-byte fonts.
Also:
- SkTestTypeface returns tounicode map for testing.
- Unit test updated
All PDFs render the same
BUG=skia:5606
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2292303004
Review-Url: https://codereview.chromium.org/2292303004
4 files changed