Moving extra options/parameters into PDFMetadata

Bug: skia:
Change-Id: I29aa69e5765a7f8ba05b0361912d1f5276d77de3
Reviewed-on: https://skia-review.googlesource.com/84501
Reviewed-by: Hal Canary <halcanary@google.com>
Commit-Queue: Mike Reed <reed@google.com>
13 files changed