Those two properties may or may not work in some (but probably not all) cases. I have been using El Capitan exclusively when implementing those properties, so I don't have any experience with other Operating Systems. This task is probably trivial.
<rdar://problem/22959953>
<rdar://problem/22959959>
Created attachment 262852 [details] Patch
Comment on attachment 262852 [details] Patch Attachment 262852 [details] did not pass mac-ews (mac): Output: http://webkit-queues.webkit.org/results/266949 New failing tests: css3/font-feature-settings-rendering-2.html css3/font-feature-settings-rendering.html css3/font-variant-all-webfont.html css3/font-feature-settings-preinstalled-fonts.html
Created attachment 262854 [details] Archive of layout-test-results from ews103 for mac-mavericks The attached test failures were seen while running run-webkit-tests on the mac-ews. Bot: ews103 Port: mac-mavericks Platform: Mac OS X 10.9.5
Comment on attachment 262852 [details] Patch Attachment 262852 [details] did not pass mac-wk2-ews (mac-wk2): Output: http://webkit-queues.webkit.org/results/267001 New failing tests: css3/font-feature-settings-rendering.html css3/font-feature-settings-preinstalled-fonts.html css3/font-variant-all-webfont.html css3/font-feature-settings-rendering-2.html
Created attachment 262856 [details] Archive of layout-test-results from ews107 for mac-mavericks-wk2 The attached test failures were seen while running run-webkit-tests on the mac-wk2-ews. Bot: ews107 Port: mac-mavericks-wk2 Platform: Mac OS X 10.9.5
Created attachment 262868 [details] Patch
Comment on attachment 262868 [details] Patch Attachment 262868 [details] did not pass mac-ews (mac): Output: http://webkit-queues.webkit.org/results/269058 New failing tests: css3/font-feature-settings-rendering.html css3/font-variant-all.html
Created attachment 262869 [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
Comment on attachment 262868 [details] Patch Attachment 262868 [details] did not pass mac-wk2-ews (mac-wk2): Output: http://webkit-queues.webkit.org/results/269059 New failing tests: css3/font-feature-settings-rendering.html css3/font-variant-all.html
Created attachment 262870 [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
Created attachment 262871 [details] Patch
Comment on attachment 262871 [details] Patch Clearing flags on attachment: 262871 Committed r190876: <http://trac.webkit.org/changeset/190876>
All reviewed patches have been landed. Closing bug.