SetMidCommitCallback 2066 sync/engine/syncer_unittest.cc mock_server_->SetMidCommitCallback( SetMidCommitCallback 4379 sync/engine/syncer_unittest.cc mock_server_->SetMidCommitCallback( SetMidCommitCallback 4407 sync/engine/syncer_unittest.cc mock_server_->SetMidCommitCallback(base::Closure()); SetMidCommitCallback 49 sync/test/engine/mock_connection_manager.h void SetMidCommitCallback(const base::Closure& callback);