heartbeat_manager.h    5 google_apis/gcm/engine/heartbeat_manager.cc #include "google_apis/gcm/engine/heartbeat_manager.h"
heartbeat_manager.h    5 google_apis/gcm/engine/heartbeat_manager_unittest.cc #include "google_apis/gcm/engine/heartbeat_manager.h"
heartbeat_manager.h   20 google_apis/gcm/engine/mcs_client.h #include "google_apis/gcm/engine/heartbeat_manager.h"