Revert on the way: https://chromium-review.googlesource.com/c/chromium/src/+/922068

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/5a5d5d9d63a1540226bfb22a4db878efee822a6d

commit 5a5d5d9d63a1540226bfb22a4db878efee822a6d
Author: Tim Schumann <tschumann@chromium.org>
Date: Thu Feb 15 16:29:12 2018

Revert "remove ThreadLocalStorage::StaticSlot"

This reverts commit 88a96c6e1b592b920cd00655b88225334c0c4541.

Reason for revert: breaks base_unittests failing on multiple builders (ThreadHeapUsageShimTest.HooksIntoMallocWhenShimAvailable)

BUG= 812650 
Original change's description:
> remove ThreadLocalStorage::StaticSlot
> 
> in favor of the pattern with
> NoDestructor<ThreadLocalStorage::Slot> as discussed on PS1 @
> https://chromium-review.googlesource.com/c/chromium/src/+/881017/1
> 
> StaticSlot has been subject to a possible initialization race:
> CHECK_NE(slot_, kInvalidSlotValue) in StaticSlot::Initialize
> could fail if another thread initialized it to kInvalidSlotValue
> 
> Change-Id: Iefaa1dde6f85842d20561851a9a26ad5f3a20973
> Reviewed-on: https://chromium-review.googlesource.com/881017
> Reviewed-by: Erik Chen <erikchen@chromium.org>
> Reviewed-by: Miriam Gershenson <mgersh@chromium.org>
> Reviewed-by: Robert Sesek <rsesek@chromium.org>
> Reviewed-by: Peter Kasting <pkasting@chromium.org>
> Reviewed-by: Gabriel Charette <gab@chromium.org>
> Commit-Queue: Gabriel Charette <gab@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#537009}

TBR=pkasting@chromium.org,danakj@chromium.org,gab@chromium.org,mgersh@chromium.org,erikchen@chromium.org,rsesek@chromium.org,akhaustov@yandex-team.ru

Change-Id: If5a61c5448c361ba2df22909930f6b1e8879e454
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/922068
Reviewed-by: Tim Schumann <tschumann@chromium.org>
Commit-Queue: Tim Schumann <tschumann@chromium.org>
Cr-Commit-Position: refs/heads/master@{#537040}
[modify] https://crrev.com/5a5d5d9d63a1540226bfb22a4db878efee822a6d/base/debug/thread_heap_usage_tracker.cc
[modify] https://crrev.com/5a5d5d9d63a1540226bfb22a4db878efee822a6d/base/debug/thread_heap_usage_tracker.h
[modify] https://crrev.com/5a5d5d9d63a1540226bfb22a4db878efee822a6d/base/debug/thread_heap_usage_tracker_unittest.cc
[modify] https://crrev.com/5a5d5d9d63a1540226bfb22a4db878efee822a6d/base/no_destructor.h
[modify] https://crrev.com/5a5d5d9d63a1540226bfb22a4db878efee822a6d/base/threading/thread_local_storage.cc
[modify] https://crrev.com/5a5d5d9d63a1540226bfb22a4db878efee822a6d/base/threading/thread_local_storage.h
[modify] https://crrev.com/5a5d5d9d63a1540226bfb22a4db878efee822a6d/base/threading/thread_local_storage_unittest.cc
[modify] https://crrev.com/5a5d5d9d63a1540226bfb22a4db878efee822a6d/base/trace_event/heap_profiler_allocation_context_tracker.cc
[modify] https://crrev.com/5a5d5d9d63a1540226bfb22a4db878efee822a6d/chrome/common/profiling/memlog_allocator_shim.cc
[modify] https://crrev.com/5a5d5d9d63a1540226bfb22a4db878efee822a6d/components/url_formatter/idn_spoof_checker.cc
[modify] https://crrev.com/5a5d5d9d63a1540226bfb22a4db878efee822a6d/net/dns/dns_reloader.cc
[modify] https://crrev.com/5a5d5d9d63a1540226bfb22a4db878efee822a6d/third_party/crashpad/README.chromium
[modify] https://crrev.com/5a5d5d9d63a1540226bfb22a4db878efee822a6d/third_party/crashpad/crashpad/util/thread/thread_log_messages.cc

 Issue 812649  has been merged into this issue.