Bug 784739 - Switch from NULL to nullptr in dom/indexedDB/; r=ehsan

--HG--
extra : rebase_source : 911f00517a3281b87cde7c90c2708ef8807054f7
Bug 784739 - Switch from NULL to nullptr in miscellaneous directories; r=ehsan

--HG--
extra : rebase_source : 8ace754e117a12e2599f5a90030f13a3a7064fed
Bug 784739 - Switch from NULL to nullptr in webrtc/signaling/; r=ehsan

--HG--
extra : rebase_source : 47841196d7805fd8d69749d554afcc31eff18826