GitLab

This observer is called when new print job is saved.
This is required to fire corresponding chrome.printingMetrics events.

Bug: 992889
Change-Id: I9c8c980201e2ea181cf80b5b40bc7806bcd6c559
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1780830
Commit-Queue: Nikita Podguzov <nikitapodguzov@google.com>
Reviewed-by: Denis Kuznetsov <antrim@chromium.org>
Reviewed-by: Sean Kau <skau@chromium.org>
Cr-Commit-Position: refs/heads/master@{#696777}