bug 872183 - fix simple typo in hb_set_t.get_min(). r=jdaggett
Bug 872191 - Rooting hazard in ion/Lowering.cpp. r=jonco

--HG--
extra : rebase_source : c1c792ee2aa9d21545392731f9068d48e8dab969
Bug 871995 - Fix rooting compilation failure in ObjectWrapperParent.cpp. r=till

--HG--
extra : rebase_source : 1477ca11f53e4b91ae694d0511e11b4e50dbd173