Revert of Fix CPU profiler deadlock on Windows + AMD CPU.

Revert of Fix CPU profiler deadlock on Windows + AMD CPU. (patchset #1 id:1 of https://codereview.chromium.org/1304873011/ )

Reason for revert:
Broke a test

Original issue's description:
> Fix CPU profiler deadlock on Windows + AMD CPU.
>
> Implement a lock free version of RolloverProtectedTickClock::Now
> to eliminate a deadlock.
>
> BUG=chromium:521420
> LOG=Y
>
> Committed: https://crrev.com/d6db8e5902af1f067f0f149844f4e92824ee93f3
> Cr-Commit-Position: refs/heads/master@{#30489}

TBR=yurys@chromium.org,caseq@chromium.org,bmeurer@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:521420
Committed: https://crrev.com/8e78d55d6ee2fd50f14a316b767c617988acbde6
Cr-Commit-Position: refs/heads/master@{#30490}

[alph, 2015-09-01 04:10:43]

Created Revert of Fix CPU profiler deadlock on Windows + AMD CPU.

[commit-bot: I haz the power, 2015-09-01 04:10:54]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1303423006/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1303423006/1

[commit-bot: I haz the power, 2015-09-01 04:11:05]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-01 04:11:14]

Patchset 1 (id:??) landed as
https://crrev.com/8e78d55d6ee2fd50f14a316b767c617988acbde6
Cr-Commit-Position: refs/heads/master@{#30490}