Original commit message:

    This commit adds some postmortem data that is otherwise unavailable.

    I have discovered need in those values when writing:

    https://github.com/indutny/llnode

    BUG=

    Review URL: https://codereview.chromium.org/1436473002

    Cr-Commit-Position: refs/heads/master@{nodejs#31947}

This postmortem information is useful for both object inspection, and
function's context variables inspection.

Ref: nodejs#3779
PR-URL: nodejs#4106
Reviewed-By: bnoordhuis - Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: targos - Michaël Zasso <mic.besace@gmail.com>
Reviewed-By: rvagg - Rod Vagg <rod@vagg.org>

Original commit message:

  [tools] Make gen-postmortem-metadata.py more reliable

  Instead of basing matches off of whitespace, walk the
  inheritance chain and include any classes that inherit
  from Object.

  R=machenbach@chromium.org,jkummerow@chromium.org
  NOTRY=true

  Review URL: https://codereview.chromium.org/1435643002

  Cr-Commit-Position: refs/heads/master@{nodejs#31964}

This adds some missing classes to postmortem info like
JSMap and JSSet.

Ref: nodejs#3792
PR-URL: nodejs#4106
Reviewed-By: bnoordhuis - Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: targos - Michaël Zasso <mic.besace@gmail.com>
Reviewed-By: rvagg - Rod Vagg <rod@vagg.org>

The error message returned on ArrayBuffer allocation failure is now different
as per https://codereview.chromium.org/1393263003.

PR-URL: nodejs#4399
Reviewed-By: targos - Michaël Zasso <mic.besace@gmail.com>