Automatic update from web-platform-tests [nativeio] Add Flush() This CL implements a flush function that attempts to flush any write buffers, including device buffers, by calling base::File::Flush(). This comes with the intent to evaluate developer feedback. Note that a future version of the API might include a faster, less reliable variant of flush. Bug: 914488 Change-Id: I556cea0f4872e5536e413b91df575c4f6a00a55e Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2257934 Commit-Queue: Richard Stotz <rstz@chromium.org> Reviewed-by: Victor Costan <pwnall@chromium.org> Reviewed-by: Mike West <mkwst@chromium.org> Cr-Commit-Position: refs/heads/master@{#796343} -- wpt-commits: e0a417a2f108468d245fb2dd9562ef6838197842 wpt-pr: 24934