GitLab

Add default NTP font and make it platform specific by setting font on
the document.body. Elements can further overwrite it if needed.

Bug: 867759
Change-Id: Ia9332ce0f768474ba33e7b7948f7b4596d2e3271
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1490450
Commit-Queue: Gayane Petrosyan <gayane@chromium.org>
Reviewed-by: Kristi Park <kristipark@chromium.org>
Reviewed-by: Kyle Milka <kmilka@chromium.org>
Cr-Commit-Position: refs/heads/master@{#638027}