SupportsAcknowledgement  123 sync/internal_api/public/base/invalidation.cc   if (SupportsAcknowledgement()) {
SupportsAcknowledgement  134 sync/internal_api/public/base/invalidation.cc   if (SupportsAcknowledgement()) {
SupportsAcknowledgement   70 sync/internal_api/public/base/invalidation.h   bool SupportsAcknowledgement() const;