Revert of Disable RunMultiThread_DirectRenderer on Windows (patchset #2 id:20001 of https://codereview.chromium.org/1308993006/ )
Revert of Disable RunMultiThread_DirectRenderer on Windows (patchset #2 id:20001 of https://codereview.chromium.org/1308993006/ )

Reason for revert:
Test is fixed.

Original issue's description:
> Disable LayerTreeHostAnimationTestPendingTreeAnimatesFirstCommit
>
> BUG=527087
> CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
>
> Committed: https://crrev.com/4b7f32d2326449a03c7d5c171939ac0b349af257
> Cr-Commit-Position: refs/heads/master@{#346738}

TBR=pvalenzuela@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=527087

Review URL: https://codereview.chromium.org/1308273009

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#346752}

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