There are assertions in a few WebCrypto exportData() function to verify that non-extractable keys are not exported. But the same function is used for structured clone serialization, which is allowed.
Created attachment 237050 [details]
Comment on attachment 237050 [details]
Clearing flags on attachment: 237050
Committed r172898: <http://trac.webkit.org/changeset/172898>
All reviewed patches have been landed. Closing bug.