Generate enum/getters/setters/mappings for text-underline-position.

Currently, the text-underline-position property is a 'storage_only' field,
so it has no generated public getters/setters. This patch changes it to
a 'keyword' field so that its getters/setters can be generated as well.
We also generate the TextUnderlinePosition enum and use the generated
CSSValueID <-> TextUnderlinePosition mappings.

Diff of generated files:

Bug: 628043
Change-Id: Ida488dc25572ad5ede5c5f97a7f44a375de4f29b
Commit-Queue: Darren Shen <>
Reviewed-by: Rune Lillesveen <>
Reviewed-by: Naina Raisinghani <>
Cr-Commit-Position: refs/heads/master@{#477466}
4 files changed