GitLab

We no longer support PDFEngine implementations other than PDFiumEngine,
so there's no need for a PDFEngine::Create() factory that abstracts
which PDFEngine implementation is created.

This also allows OutOfProcessInstance to use PDFiumEngine directly,
rather than having to add methods to PDFEngine first.

Bug: 1076554
Change-Id: I8808038ff5ed0db58719905c2aa8157fbd4bb092
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2340280Reviewed-by: Lei Zhang <thestig@chromium.org>
Reviewed-by: Daniel Hosseinian <dhoss@chromium.org>
Commit-Queue: K. Moon <kmoon@chromium.org>
Cr-Commit-Position: refs/heads/master@{#795654}