As part of bug 32933, blob support got turned on for the Mac. As time has gone on, more and more code has come to depend on ENABLE(BLOB). This means that Mac and Windows are diverging more and more in terms of web APIs. For example, the XHR responseType 'arraybuffer' is dependent on ENABLE(BLOB), meaning that it works on Mac but not on Windows. This is causing multiple regression tests to fail on Windows currently.
We should make Mac and Windows behave the same in this regard. We should either turn off BLOB on Mac or turn it on on Windows.
(You can see the regression test failures here: <http://build.webkit.org/results/Windows%207%20Release%20(Tests)/r73026%20(6983)/results.html>. Ignore the non-XHR ones.)
Landed failing results for Windows for:
Created attachment 89114 [details]
Comment on attachment 89114 [details]
Fixed in http://trac.webkit.org/changeset/83532