* commit '510d817977af6761274e700178a854b9f9160d9c': cherrypick from master docs: Battery class C2DM -> GCM Change-Id: If5fe0034ae0bb72c321b591f84e79acbaf2e36f1
* commit '510d817977af6761274e700178a854b9f9160d9c': cherrypick from master docs: Battery class C2DM -> GCM Change-Id: If5fe0034ae0bb72c321b591f84e79acbaf2e36f1