Re-add "-Xclang -no-opaque-pointers"

Reverts https://crrev.com/c/3646948 and a follow-up patch https://crrev.com/c/3650437.

Removing this flag may be causing miscompiles. Speculatively revert.

Bug: 1322823
Change-Id: I1e5f210c76dfaa2b842bcc7d3205add797a330d7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3648575
Reviewed-by: Nico Weber <thakis@chromium.org>
Commit-Queue: Arthur Eubanks <aeubanks@google.com>
Cr-Commit-Position: refs/heads/main@{#1003869}
NOKEYCHECK=True
GitOrigin-RevId: 2ab3924df9894cfba339ce1765eab3d3da22994f
1 file changed