* stable-3.1:
Fix incorrect css variable syntax on gr-tooltip
Fix shortcut for next thread group for polymer 2
Include the common shared-styles for endpoint shared styles
Fix css for textarea
Check for undefined on `_computeparentListClass`
Fix spelling mistake in documentation
Revert "restapi: add an alternative CreateChange endpoint"
Revert "Migrate to new createChange rest api"
Revert "Fix create change api"
Change-Id: Icdb23ec1ae2067b63ccaca8403704e8216a96481
3b10eee9fa