GitLab

Update FontDescription::BolderWeight and LighterWeight to match the table
in https://drafts.csswg.org/css-fonts-4/#font-weight-prop .

Bug: 809956
Change-Id: I18cb9a10ef3d86f68113bb0663e5364d0120a739
Reviewed-on: https://chromium-review.googlesource.com/997592
Commit-Queue: Fredrik Söderquist <fs@opera.com>
Reviewed-by: Dominik Röttsches <drott@chromium.org>
Cr-Commit-Position: refs/heads/master@{#548741}