Backed out changesets f2387d9f146c and d12788533ab7 (bug 860145) for causing topcrashers.
Bug 429023 - Use preference 'spellchecker.dictionary_path' to override loading internal dictionaries; r=ehsan,glandium
Merge m-c to inbound.
Backed out changeset 6c9af867443c (bug 863264) for Android reftest failures on a CLOSED TREE.