In r167022 I moved the common CSS selectors into RegionsShapes.css, then I linked it into the perf test files, but the measurement results dropped down from about 400ms to 10ms. I realized it's caused by the linked css rule, so I've put the selectors back into every test case, which fixes the test measurements.
Created attachment 229177 [details] Patch
Comment on attachment 229177 [details] Patch Attachment 229177 [details] did not pass mac-wk2-ews (mac-wk2): Output: http://webkit-queues.appspot.com/results/6490103438376960 New failing tests: compositing/iframes/invisible-nested-iframe-hide.html
Created attachment 229185 [details] Archive of layout-test-results from webkit-ews-15 for mac-mountainlion-wk2 The attached test failures were seen while running run-webkit-tests on the mac-wk2-ews. Bot: webkit-ews-15 Port: mac-mountainlion-wk2 Platform: Mac OS X 10.8.5
Comment on attachment 229177 [details] Patch Looks good.
Comment on attachment 229177 [details] Patch Clearing flags on attachment: 229177 Committed r167315: <http://trac.webkit.org/changeset/167315>
All reviewed patches have been landed. Closing bug.