Backed out changeset 5852ae12e124 (bug 1096263) for bustage.

--HG--
extra : rebase_source : 16a600dfc82bee3025c7be33bd95351b5c1159dd
Bug 1096263 - XMLHttpRequest.send({}) should not throw. r=bz, a=bajaj

--HG--
extra : rebase_source : ad8ea4bbe2a1144c10b47d18006f843d453e0028