deps: backport 8eda85d from v8 upstream

[indutny]

Checklist

• tests and code linting passes
• the commit message follows commit guidelines

Affected core subsystem(s)

deps

Description of change

Original commit message:

Postmortem: export DATA_CONSTANT

Useful for inspecting constant fields in objects.

BUG=
R=machenbach

Review-Url: https://codereview.chromium.org/1922903003
Cr-Commit-Position: refs/heads/master@{#35826}

Note: this is really useful for llnode, since EventHandlers
fields are stored as a constant fields in the v6.

cc @nodejs/v8

[indutny]

CI: https://ci.nodejs.org/job/node-test-pull-request/2409/

[bnoordhuis]

LGTM, I guess, but can't this be cherry-picked to v5.0 upstream, followed by a wholesale upgrade here?

[indutny]

Yep, sounds like a good plan.

[indutny]

Wait, v8 v5 upstream? I'll ping them about it.

[bnoordhuis]

The branch is still open, AFAIK, so you should be able to tools/release/merge_to_branch.py it.

[jeisinger]

@natorion manages back-merges to active v8 branches, please sync with him

[natorion]

Could you please use the process outlined in https://github.com/v8/v8/wiki/Merging%20&%20Patching ? I think Fedor already created a bug?

[indutny]

@natorion yeah, will do it correctly this time. Sorry! 👍

[indutny]

Should come to use with the next v8 upgrade. cc @ofrobots

[ofrobots]

Next v8 upgrade contains this: #6572. Once that lands on master, it can be merged to v6.x as well (I can do that).

This issue could be closed; except that it has the lts-watch-4.x tag.

[indutny]

Thank you @ofrobots !