The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/7e8a479508cedbab62482322835f814f8b777162

commit 7e8a479508cedbab62482322835f814f8b777162
Author: dpapad <dpapad@chromium.org>
Date: Mon Oct 02 18:37:48 2017

WebUI MD: Simplify container drop shadow effect styling.

Bug:  769985 
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: I76dd896c034c2d342a1991eabb45732fa858a597
Reviewed-on: https://chromium-review.googlesource.com/693146
Reviewed-by: Scott Chen <scottchen@chromium.org>
Commit-Queue: Demetrios Papadopoulos <dpapad@chromium.org>
Cr-Commit-Position: refs/heads/master@{#505691}
[modify] https://crrev.com/7e8a479508cedbab62482322835f814f8b777162/chrome/browser/resources/md_downloads/manager.html
[modify] https://crrev.com/7e8a479508cedbab62482322835f814f8b777162/chrome/browser/resources/md_history/app.html
[modify] https://crrev.com/7e8a479508cedbab62482322835f814f8b777162/ui/webui/resources/cr_elements/shared_vars_css.html