These two properties are defined in the CSS Box Alignment Module Level 3, bit still not supported in WebKit. Both should be supported by the CSS Grid Layout standard and they would be quite useful for the grid related use cases, so I think it's now time to implement them in WebKit. Later, we will have to add the required support in the grid implementation (bug #133280)
Created attachment 249762 [details] Patch
Created attachment 249765 [details] Patch
Comment on attachment 249765 [details] Patch Attachment 249765 [details] did not pass mac-wk2-ews (mac-wk2): Output: http://webkit-queues.appspot.com/results/6605964031557632 New failing tests: svg/css/getComputedStyle-basic.xhtml
Created attachment 249776 [details] Archive of layout-test-results from ews105 for mac-mavericks-wk2 The attached test failures were seen while running run-webkit-tests on the mac-wk2-ews. Bot: ews105 Port: mac-mavericks-wk2 Platform: Mac OS X 10.9.5
Comment on attachment 249765 [details] Patch Attachment 249765 [details] did not pass mac-ews (mac): Output: http://webkit-queues.appspot.com/results/5671725966557184 New failing tests: svg/css/getComputedStyle-basic.xhtml
Created attachment 249779 [details] Archive of layout-test-results from ews102 for mac-mavericks The attached test failures were seen while running run-webkit-tests on the mac-ews. Bot: ews102 Port: mac-mavericks Platform: Mac OS X 10.9.5
Created attachment 249820 [details] Patch
Comment on attachment 249820 [details] Patch r=me
Comment on attachment 249820 [details] Patch Clearing flags on attachment: 249820 Committed r182613: <http://trac.webkit.org/changeset/182613>
All reviewed patches have been landed. Closing bug.
This may have caused some test failures: https://build.webkit.org/results/Apple%20Yosemite%20Debug%20WK1%20(Tests)/r182613%20(3666)/results.html
umm, sorry but I don't see the relation of my patch with such failures. Why do you think this patch may have caused them ?