GitLab

Revert of tcmalloc: Use C++11 atomics where appropriate. (patchset #8 id:140001 of https://codereview.chromium.org/1549913002/ )

Reason for revert:
Caused performance problems (see http://crbug.com/572525 and dupes)

Original issue's description:
> tcmalloc: Use C++11 atomics where appropriate.
>
> Ports these CLs to tcmalloc:
> https://codereview.chromium.org/636783002/
> https://codereview.chromium.org/1466833002/ (except mac)
>
> No intended behavior change, but it should remove
> the static initializer in atomicops_internals_x86_gcc.h
> on Linux.  It's also less code.
>
> BUG=94925,559247
>
> Committed: https://crrev.com/e13537fe418eff11d3cab9077f6a647d7c74f103
> Cr-Commit-Position: refs/heads/master@{#366904}

TBR=jfb@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=94925,559247

Review URL: https://codereview.chromium.org/1557433002

Cr-Commit-Position: refs/heads/master@{#367069}