GitLab

Add method GetRecentlyUsedPrinters() for use with the CUPS proxy.

Bug: 1015662
Test: xvfb-run ./unit_tests --gtest_filter=PrintPreviewStickySettingsUnittest.*

Change-Id: I908f47d45259ab8dd941d320dad66275b95e00b3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2359729
Commit-Queue: Pranav Batra <batrapranav@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#807228}