OnMessageReceivedCallback  171 google_apis/gcm/engine/mcs_client.cc     const OnMessageReceivedCallback& message_received_callback,
OnMessageReceivedCallback  105 google_apis/gcm/engine/mcs_client.h                   const OnMessageReceivedCallback& message_received_callback,
OnMessageReceivedCallback  204 google_apis/gcm/engine/mcs_client.h   OnMessageReceivedCallback message_received_callback_;