Bug 827274 - Fix bustage, r=mrbkap.
Bug 822551 - Initialize the user agent overrides in content process frames. r=dao,vingtetun
Backout 6f5b253ab7b7 - Bug 818843 - This change broke building B2G on the mac. r=me

--HG--
extra : rebase_source : 73c82280ee691d4874e0c51c5e90165e92cc40f0
Backout c9831bed6bb7 - Bug 818843 - This change broke building B2G on the mac. r=me

--HG--
extra : rebase_source : 7bef8dc1c394d45302f17379ab2cbd90ecda6975