Revert "Store the current SequenceManagerImpl instance in TLS"

This reverts commit 426952a6d28d89caed29b48ef4455a79f1c0d964.

Reason for revert: Causes builder Mac10.12 Tests to fail. See bug 943537

Original change's description:
> Store the current SequenceManagerImpl instance in TLS
> Now that the backend for MessageLoop is always a SequenceManager it no
> longer makes sense to have the TLS logic in MessageLoopCurrent.
> Eventually MessageLoopBase will disappear completely and
> MessageLoopCurrent will use the API exposed by SequenceManager. This
> patch is a step in that direction.
> Bug: 891670
> Change-Id: I24a76ded54fcf4b95bc8192ce0fe413aaeee162d
> Reviewed-on:
> Commit-Queue: Carlos Caballero <>
> Reviewed-by: Sami Kyöstilä <>
> Reviewed-by: Gabriel Charette <>
> Reviewed-by: Alexander Timin <>
> Cr-Commit-Position: refs/heads/master@{#641834},,,

Change-Id: I64971722513c63385aea97d61b5c4ddba267faa7
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 891670, 943537
Reviewed-by: Alexander Hendrich <>
Commit-Queue: Alexander Hendrich <>
Cr-Commit-Position: refs/heads/master@{#641850}
4 files changed