Revert "Roll clang 356356:357316."

This reverts commit f1a87c1692c339356429b9825c3bb22a6fdad3ee.

Reason for revert:
Made a downstream V8 build pathologically slow, see bug.

Original change's description:
> Roll clang 356356:357316.
> 
> Ran `tools/clang/scripts/upload_revision.py 357316`.
> 
> Bug: 945170
> Change-Id: I44f4a2c4302b11acaffbc037351a77812cd5f996
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1546709
> Reviewed-by: Hans Wennborg <hans@chromium.org>
> Commit-Queue: Bob Haarman <inglorion@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#646370}

TBR=hans@chromium.org,inglorion@chromium.org

Change-Id: Ib42e4fe1a264b64cfc1500dda1080aeb070cf630
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 945170, 948590
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1549081
Reviewed-by: Hans Wennborg <hans@chromium.org>
Commit-Queue: Hans Wennborg <hans@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#646817}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: f28f06e3c2d19b183262cb3913c60131e8c11351
1 file changed