DevTools: Update CSSMetadata for 2018

Adds new properties, removes old properties, and adds some missing
property values.

In addition, the values 'auto' and 'none' are determined at runtime
instead of appearing in the CSSMetadata json. This saves some bytes,
but more importantly it makes CSSMetadata more resilient to new CSS
properties being added.

Change-Id: I6f97f14ab56a43f990f5bc0756953a12071eef1d
Reviewed-by: Andrey Lushnikov <>
Commit-Queue: Joel Einbinder <>
Cr-Commit-Position: refs/heads/master@{#578039}
1 file changed