CL at https://chromium-review.googlesource.com/c/chromium/src/+/784390.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/d326faa6921266aeb9900a3928bf572441ed6b91

commit d326faa6921266aeb9900a3928bf572441ed6b91
Author: dpapad <dpapad@chromium.org>
Date: Wed Nov 22 20:07:35 2017

MD Extensions polish: Add drop shadow in details/error views.

Bug:  787207 
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: I02aa1a57a65265d97eebcc929335eb7bf19c891f
Reviewed-on: https://chromium-review.googlesource.com/784390
Commit-Queue: Demetrios Papadopoulos <dpapad@chromium.org>
Reviewed-by: Dan Beam (no longer on Chrome) <dbeam@chromium.org>
Cr-Commit-Position: refs/heads/master@{#518723}
[modify] https://crrev.com/d326faa6921266aeb9900a3928bf572441ed6b91/chrome/browser/resources/md_extensions/detail_view.html
[modify] https://crrev.com/d326faa6921266aeb9900a3928bf572441ed6b91/chrome/browser/resources/md_extensions/error_page.html