Add end-to-end tests to make sure printing PDFs with line caps and line
joins to PostScript printers on Windows works correctly.

Bug: 1049410
Change-Id: I92e2b22f49ad7e70660d34252b8224031ef03583
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2044996Reviewed-by: Daniel Hosseinian <dhoss@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#741228}