SkPDF: unify Canon and Document
motivation: The Document has become intrusive enough that we almost
always have a pointer to the Document on hand anyways.
Also: update document.
Also: forward declare more things in headers.
Also, don't try to clean up resources when abort() or close() is called.
It is easy enough for the client to delete the Document when done.
Change-Id: I21aeed37f26ba16d68af041d9317adf00e9a61f2
Reviewed-on: https://skia-review.googlesource.com/c/180646
Commit-Queue: Hal Canary <halcanary@google.com>
Reviewed-by: Herb Derby <herb@google.com>
18 files changed