Blame upstream r69755 (see URL), which moved the webkit/glue/plugins directory to webkit/plugins/npapi.
Created attachment 257640 [details, diff] Adjust path in patch, apply to ebuild
Looks like I jumped the gun on this: r69755 was reverted. Probably best to give this a day or two to settle down.
It does not seem r69755 has been reverted. With r69817, problem is still there. Nevertheless, the attached patch works for me.
Reverted in r69771 and reapplied in r69808. Thanks for testing.
Still working... Could this be applied into portage tree or is there any reason to keep this bug open? (I have to re-apply each time). Idem for #349228 Thanks.
Fixed in CVS, thanks!