Backed out 3 changesets (bug 957086) for causing bug 1018406

Backed out changeset f8b6dab2f985 (bug 957086)
Backed out changeset b69bcaa24ab5 (bug 957086)
Backed out changeset 3b45335d4694 (bug 957086)

--HG--
rename : dom/datastore/DataStoreImpl.js => dom/datastore/DataStoreImpl.jsm
Merge m-c into b2g-i