Automatic update from web-platform-tests Implement performance.markConditional(...) performance.markConditional(...) creates lightweight tracing points that only occur in PerformanceLongAnimationFrameTiming. A follow-up CL will implement performance.measureConditional(...). Explainer: https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/ConditionalTracing/explainer-for-loaf.md I2P: https://groups.google.com/a/chromium.org/g/blink-dev/c/Ur_FiEgzLvk/m/NOCKYJs1BwAJ Chromestatus: https://chromestatus.com/feature/5693676597673984 Bug: 383157188 Change-Id: I9e6728a44975cd8e7bd8ef3ff280841f058fcaea Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7965263 Commit-Queue: Guohui Deng <guohuideng@microsoft.com> Reviewed-by: Chris Harrelson <chrishtr@chromium.org> Reviewed-by: Noam Rosenthal <nrosenthal@google.com> Cr-Commit-Position: refs/heads/main@{#1659020} -- wpt-commits: 9c95f8a1dfa49896bd8d9045b0b256d1950c0276 wpt-pr: 61167