And it's enabled by default since 107
Issue tracker for windows https://bugs.chromium.org/p/chromium/issues/detail?id=128613...
Author of this patchset described their journey all the way from understanding Chromium's decoding process to testing HDR to SDR tone mapping in their blog post https://zhuanlan.zhihu.com/p/541082191. Too bad it's only available in Chinese though.
