Port generated CSS property IDs to CSSPropertyID

CSSPropertyID was changed to an scoped enum in
https://crrev.com/c/1520674, and equivalent int variables were
introduced while the remaining uses were ported. This CL ports the
CSS property IDs that are generated from templates.

Bug: 936369
Change-Id: I6c468f288b9fb640cb08408dfe936db0f35eb0dd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1530991
Reviewed-by: Kent Tamura <tkent@chromium.org>
Commit-Queue: Henrique Ferreiro <hferreiro@igalia.com>
Cr-Commit-Position: refs/heads/master@{#642842}
9 files changed