Revert of Try changing LockImpl to not have a spin count to see how it affects performance. (patchset #1 id:1 of https://codereview.chromium.org/1333053002/ )
Revert of Try changing LockImpl to not have a spin count to see how it affects performance. (patchset #1 id:1 of https://codereview.chromium.org/1333053002/ )

Reason for revert:
didn't make any difference

Original issue's description:
> Try changing LockImpl to not have a spin count to see how it affects performance.
>
> This was last change 7 years ago, and we have grown a lot of usages of locks since then. Since we don't use pthread_spin_lock on posix, I'm curious how this affects performance today on Windows.
>
> Committed: https://crrev.com/00c9ca679badffc7584439fff00f18cb3977d5da
> Cr-Commit-Position: refs/heads/master@{#348280}

TBR=cpu@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/1340653003

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#348417}

CapOM/ChromiumGStreamerBackend,CapOM/ChromiumGStreamerBackend,ltilve/ChromiumGStreamerBackend,CapOM/ChromiumGStreamerBackend,ltilve/ChromiumGStreamerBackend,ltilve/ChromiumGStreamerBackend,ltilve/ChromiumGStreamerBackend,CapOM/ChromiumGStreamerBackend,ltilve/ChromiumGStreamerBackend,CapOM/ChromiumGStreamerBackend,ltilve/ChromiumGStreamerBackend,CapOM/ChromiumGStreamerBackend,CapOM/ChromiumGStreamerBackend,ltilve/ChromiumGStreamerBackend,ltilve/ChromiumGStreamerBackend,ltilve/ChromiumGStreamerBackend,CapOM/ChromiumGStreamerBackend,CapOM/ChromiumGStreamerBackend