The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/93071987c2a2fd241ffcc5d0b9130318a231e06e

commit 93071987c2a2fd241ffcc5d0b9130318a231e06e
Author: rbpotter <rbpotter@chromium.org>
Date: Tue May 08 21:32:50 2018

Print Preview Componentization: Allow other commas

- Allow alternative commas in the Print Preview UI for the pages field
- Migrate tests for pages syntax
- Fixes to match behavior of current UI (i.e. show error for 2 commas
  in a row, 0 is invalid syntax instead of out of bounds).

Bug:  814860 ,  814861 
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: Ied57eaf87b68cd712fe50970a37a71401c977a0c
Reviewed-on: https://chromium-review.googlesource.com/1048468
Commit-Queue: Rebekah Potter <rbpotter@chromium.org>
Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Cr-Commit-Position: refs/heads/master@{#556965}
[modify] https://crrev.com/93071987c2a2fd241ffcc5d0b9130318a231e06e/chrome/browser/resources/print_preview/new/pages_settings.html
[modify] https://crrev.com/93071987c2a2fd241ffcc5d0b9130318a231e06e/chrome/browser/resources/print_preview/new/pages_settings.js
[modify] https://crrev.com/93071987c2a2fd241ffcc5d0b9130318a231e06e/chrome/test/data/webui/print_preview/new_print_preview_ui_browsertest.js
[add] https://crrev.com/93071987c2a2fd241ffcc5d0b9130318a231e06e/chrome/test/data/webui/print_preview/pages_settings_test.js