Port CSS keywords in the remaining CSS property files to CSSValueID

CSSValueID was changed to an scoped enum in https://crrev.com/c/1530916,
and equivalent int variables were introduced while the remaining uses
were ported. This CL ports the remaining keyword values in
third_party/blink/renderer/core/css/properties.

Bug: 936371
Change-Id: I7f7731630a67245c4e7b05d889cabf91b65df64c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1529026
Commit-Queue: Henrique Ferreiro <hferreiro@igalia.com>
Reviewed-by: Kent Tamura <tkent@chromium.org>
Cr-Commit-Position: refs/heads/master@{#643725}
13 files changed