Revert 254986 "Switch thread_local to use chromium's TLS impleme..."

Revert 254986 "Switch thread_local to use chromium's TLS impleme..."

> Switch thread_local to use chromium's TLS implementation
> 
> This patch switch thread_local to use ThreadLocalStorage::Slot, so it get the
> TLS slot from the chromium's TLS instead of OS's.
> 
> There is debate whether the Windows' TLS's destructor implementation is reliable
> or not, if we are able to remove all the use of TLS destructor, only ThreadLocalStorage::Slot
> needs to change, as thread_local doesn't use TLS destructor at all.
> 
> BUG=264406
> 
> Review URL: https://codereview.chromium.org/139633003

TBR=michaelbai@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=255102

[oshima, 2014-03-05 18:47:48]

Committed patchset #1 manually as r255102.

[Ken Russell (switch to Gerrit), 2014-03-05 19:10:34]

When reverting CLs, could you please add a brief description of why it was
reverted, so others know what symptoms to look for?

[oshima, 2014-03-05 19:17:46]

On 2014/03/05 19:10:34, Ken Russell wrote:
> When reverting CLs, could you please add a brief description of why it was
> reverted, so others know what symptoms to look for?

I contacted michaelbai@ directly before revert. Sorry about not adding the bug
ID though (crbug.com/349507).

[Ken Russell (switch to Gerrit), 2014-03-05 19:23:21]

Thanks. These TLS changes caused severe problems on the GPU bots at one point,
so I appreciate knowing the symptom of the new failure.