'The CSS WG has resolved that the 'left' and 'right' values should be removed from the block/cross-axis alignment properties (align-self and align-items). https://github.com/w3c/csswg-drafts/issues/1403#issuecomment-311722607 The same applies to the align-content and justify-content properties.
Created attachment 331973 [details] Patch
Comment on attachment 331973 [details] Patch Attachment 331973 [details] did not pass mac-wk2-ews (mac-wk2): Output: http://webkit-queues.webkit.org/results/6175573 New failing tests: fast/css-grid-layout/grid-item-auto-sized-align-justify-margin-border-padding.html
Created attachment 331982 [details] Archive of layout-test-results from ews104 for mac-sierra-wk2 The attached test failures were seen while running run-webkit-tests on the mac-wk2-ews. Bot: ews104 Port: mac-sierra-wk2 Platform: Mac OS X 10.12.6
Comment on attachment 331973 [details] Patch Attachment 331973 [details] did not pass mac-ews (mac): Output: http://webkit-queues.webkit.org/results/6175732 New failing tests: fast/css-grid-layout/grid-item-auto-sized-align-justify-margin-border-padding.html
Created attachment 331985 [details] Archive of layout-test-results from ews100 for mac-sierra The attached test failures were seen while running run-webkit-tests on the mac-ews. Bot: ews100 Port: mac-sierra Platform: Mac OS X 10.12.6
Comment on attachment 331973 [details] Patch Attachment 331973 [details] did not pass ios-sim-ews (ios-simulator-wk2): Output: http://webkit-queues.webkit.org/results/6175530 New failing tests: fast/css-grid-layout/grid-item-auto-sized-align-justify-margin-border-padding.html
Created attachment 331986 [details] Archive of layout-test-results from ews126 for ios-simulator-wk2 The attached test failures were seen while running run-webkit-tests on the ios-sim-ews. Bot: ews126 Port: ios-simulator-wk2 Platform: Mac OS X 10.12.6
Comment on attachment 331973 [details] Patch Attachment 331973 [details] did not pass mac-debug-ews (mac): Output: http://webkit-queues.webkit.org/results/6175791 New failing tests: fast/css-grid-layout/grid-item-auto-sized-align-justify-margin-border-padding.html
Created attachment 331988 [details] Archive of layout-test-results from ews114 for mac-sierra The attached test failures were seen while running run-webkit-tests on the mac-debug-ews. Bot: ews114 Port: mac-sierra Platform: Mac OS X 10.12.6
Created attachment 332018 [details] Patch
Comment on attachment 332018 [details] Patch r=me
Comment on attachment 332018 [details] Patch Clearing flags on attachment: 332018 Committed r227432: <https://trac.webkit.org/changeset/227432>
All reviewed patches have been landed. Closing bug.
<rdar://problem/36797976>