But do not call it yet during actual parsing, since the value itself is
not yet used by the storage layer.

WICG/attribution-reporting-api#1192

Bug: 40287976
Change-Id: I54fe4ae8f36017cad17fb0274035afcd591e6946
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5367804
Reviewed-by: Nan Lin <[email protected]>
Reviewed-by: Ken Buchanan <[email protected]>
Commit-Queue: Andrew Paseltiner <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1273597}

This reverts commit ff6d441.

Reason for revert: death test failing since check messages are elided
in official builds.
https://ci.chromium.org/ui/p/chrome/builders/ci/linux-chromeos-chrome/40135/overview

Original change's description:
> Add parser for Full Flex event-trigger value field
>
> But do not call it yet during actual parsing, since the value itself is
> not yet used by the storage layer.
>
> WICG/attribution-reporting-api#1192
>
> Bug: 40287976
> Change-Id: I54fe4ae8f36017cad17fb0274035afcd591e6946
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5367804
> Reviewed-by: Nan Lin <[email protected]>
> Reviewed-by: Ken Buchanan <[email protected]>
> Commit-Queue: Andrew Paseltiner <[email protected]>
> Cr-Commit-Position: refs/heads/main@{#1273597}

Bug: 40287976
Change-Id: I267ac1225dd602c0405c89c73afb2e7c3d84a5b7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5374851
Commit-Queue: Daniel Cheng <[email protected]>
Auto-Submit: Daniel Cheng <[email protected]>
Owners-Override: Daniel Cheng <[email protected]>
Commit-Queue: Rubber Stamper <[email protected]>
Bot-Commit: Rubber Stamper <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1273780}