Revert "Roll Clang 218707:223109 (+r223211, +r223219, -r220714)" and follow-ups.

Revert "Roll Clang 218707:223109 (+r223211, +r223219, -r220714)" and follow-ups.

It was causing strange test failures in Mac ASan builds.

BUG=431803, 440602
NOTRY=true
TBR=thakis

Committed: https://crrev.com/d43941e4aca78576419b8ca2d74a416b4af17d84
Cr-Commit-Position: refs/heads/master@{#307594}

[hans, 2014-12-10 00:23:14]

hans@chromium.org changed reviewers:
+ thakis@chromium.org

[hans, 2014-12-10 00:23:28]

The CQ bit was checked by hans@chromium.org

[commit-bot: I haz the power, 2014-12-10 00:24:26]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/785393002/1

[commit-bot: I haz the power, 2014-12-10 00:25:13]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-12-10 00:26:14]

Patchset 1 (id:??) landed as
https://crrev.com/d43941e4aca78576419b8ca2d74a416b4af17d84
Cr-Commit-Position: refs/heads/master@{#307594}