dbc51adbac
Summary: Issue https://github.com/facebook/rocksdb/issues/7133 reported that using `system_clock` in `FileOperationInfo::TimePoint` causes the duration of file flush operation (which can be a noop on MacOS in some scenarios) appears to be 0 and fail an assertion in listener_test. Using `steady_clock` supposedly fixed the problem. `steady_clock` actually fits better into the use cases of `FileOperationInfo::TimePoint` as all usages care about durations but not wall clock time. Pull Request resolved: https://github.com/facebook/rocksdb/pull/7153 Test Plan: make check. Reviewed By: riversand963 Differential Revision: D22654136 Pulled By: roghnin fbshipit-source-id: 5980b1080734bdae496a18071a2c2b5887c67d85