Avoid including winspool.h in printing/backend/win_helper.h.

Do IWYU for code that needs winspool.h. Rename
ScopedPrinterHandle::OpenPrinter() to OpenPrinterWithName() to avoid
conflict with ::OpenPrinter().

Change-Id: I19c925e98581862b076d0cc0b08c0f22dba719b0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1621029
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: Rebekah Potter <rbpotter@chromium.org>
Cr-Commit-Position: refs/heads/master@{#663248}
7 files changed