A lot of WebAudio IDL interfaces have the [NoInterfaceObject] extended attribute, meaning that there is no corresponding attribute on the global window object. This is not according to specification  and should probably be fixed.
Created attachment 201326 [details]
Kentaro, I assume you will review this one?
Comment on attachment 201326 [details]
Attachment 201326 [details] did not pass mac-ews (mac):
New failing tests:
Created attachment 201417 [details]
Archive of layout-test-results from webkit-ews-05 for mac-mountainlion
The attached test failures were seen while running run-webkit-tests on the mac-ews.
Bot: webkit-ews-05 Port: mac-mountainlion Platform: Mac OS X 10.8.2
Created attachment 201443 [details]
Comment on attachment 201443 [details]
Clearing flags on attachment: 201443
Committed r149920: <http://trac.webkit.org/changeset/149920>
All reviewed patches have been landed. Closing bug.