Revert of Add Reclaim Support to ThreadLocalStorage (patchset #1 id:1 of https://codereview.chromium.org/2363783002/ )

Reason for revert:
Precautionary revert while waiting for https://codereview.chromium.org/2383833004/

Will reland after branch point.

Original issue's description:
> Add Reclaim Support to ThreadLocalStorage
>
> Previously, ThreadLocalStorage::StaticSlot::Free() did not actually
> release the corresponding ThreadLocalStorage slot. It simply cleared
> out the slot and did not reuse it. As a result, each process had a
> finite number of calls to ThreadLocalStorage::StaticSlot::Initialize()
> before running out of slots.
>
> This problem would manifest itself in tests where a single process runs
> many tests that each do their own initialization and uninitialization.
> Tests that involve TLS usage caused the process to run out of TLS slots
> because there was no free support in ThreadLocalStorage.
>
> This change adds in free support by doing what most operating systems
> do, lock and track metadata in an array.
>
> BUG=590907
>
> Committed: https://crrev.com/783d1f9630c86d816669ab23981d0f3722c96808
> Cr-Commit-Position: refs/heads/master@{#421320}

TBR=brettw@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=590907

Review-Url: https://codereview.chromium.org/2395043002
Cr-Commit-Position: refs/heads/master@{#423575}


CrOS-Libchrome-Original-Commit: 75f2f7f6f9bdf3d851b5cc3914d32a3d0836c49d
2 files changed
tree: dd51080928b235db16c794eb3596ca6c1592d46d
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/