HandleProtocolEventOnFrontendLoop 328 chrome/browser/sync/glue/sync_backend_host_core.cc &SyncBackendHostImpl::HandleProtocolEventOnFrontendLoop, HandleProtocolEventOnFrontendLoop 635 chrome/browser/sync/glue/sync_backend_host_core.cc &SyncBackendHostImpl::HandleProtocolEventOnFrontendLoop, HandleProtocolEventOnFrontendLoop 176 chrome/browser/sync/glue/sync_backend_host_impl.h void HandleProtocolEventOnFrontendLoop(syncer::ProtocolEvent* event);