Revert of [compiler] Support Object.create(null) inlining in TF (patchset #5 id:80001 of https://codereview.chromium.org/2622723003/ )

Reason for revert:
Breaks buildbot: https://build.chromium.org/p/client.v8/builders/V8%20Linux64%20-%20avx2/builds/13399/steps/Benchmarks/logs/stdio

Original issue's description:
> [compiler] Support Object.create(null) inlining in TF
>
> In the ideal case, this will speed up Object.create(null) by ~10x.
>
> Drive-by-fix: Spread usage of new IsSpecialReceiverMap() and
>               IsSpecialReceiverInstanceType(InstanceType) helpers.
>
> BUG=v8:5788
>
> Review-Url: https://codereview.chromium.org/2622723003
> Cr-Commit-Position: refs/heads/master@{#42321}
> Committed: https://chromium.googlesource.com/v8/v8/+/ff7063c7d5d8ad8eafcce3da59e65d7fe2b4f915

TBR=jarin@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5788

Review-Url: https://codereview.chromium.org/2636493003
Cr-Commit-Position: refs/heads/master@{#42326}
12 files changed
tree: c8707eb7eb04e316315ab6498776b73ef12d38a5
  1. benchmarks/
  2. build_overrides/
  3. docs/
  4. gni/
  5. gypfiles/
  6. include/
  7. infra/
  8. samples/
  9. src/
  10. test/
  11. testing/
  12. third_party/
  13. tools/
  14. .clang-format
  15. .gitignore
  16. .gn
  17. .ycm_extra_conf.py
  18. AUTHORS
  19. BUILD.gn
  20. ChangeLog
  21. CODE_OF_CONDUCT.md
  22. codereview.settings
  23. DEPS
  24. LICENSE
  25. LICENSE.fdlibm
  26. LICENSE.strongtalk
  27. LICENSE.v8
  28. LICENSE.valgrind
  29. Makefile
  30. Makefile.android
  31. OWNERS
  32. PRESUBMIT.py
  33. README.md
  34. snapshot_toolchain.gni
  35. WATCHLISTS
README.md

V8 JavaScript Engine

V8 is Google's open source JavaScript engine.

V8 implements ECMAScript as specified in ECMA-262.

V8 is written in C++ and is used in Google Chrome, the open source browser from Google.

V8 can run standalone, or can be embedded into any C++ application.

V8 Project page: https://github.com/v8/v8/wiki

Getting the Code

Checkout depot tools, and run

    fetch v8

This will checkout V8 into the directory v8 and fetch all of its dependencies. To stay up to date, run

    git pull origin
    gclient sync

For fetching all branches, add the following into your remote configuration in .git/config:

    fetch = +refs/branch-heads/*:refs/remotes/branch-heads/*
    fetch = +refs/tags/*:refs/tags/*

Contributing

Please follow the instructions mentioned on the V8 wiki.