Fix bug in NetworkLog's request association
Fix bug in NetworkLog's request association

If the preflight request arrived after the request that triggered it,
the request wasn't correctly associated with the preflight request.

Bug: chromium:1196282
Change-Id: Ie85f9c6b5bbdf4f37a99a26836a26acbf73c2ad2
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2804265
Reviewed-by: Wolfgang Beyer <573aa99bb19da47d816981118f95c945310dd3f4@chromium.org>
Commit-Queue: Sigurd Schneider <f04d242e109628a27a0f75fd49a87722bcf291fd@chromium.org>

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