Revert of perf: Speculative fix for tough_webgl_ad_cases (patchset #3 id:40001 of https://codereview.chromium.org/2379073002/ )

Reason for revert:
Doesn't look like this made a difference.

Original issue's description:
> perf: Speculative fix for tough_webgl_ad_cases
>
> Committed: https://crrev.com/df8688b9fbb6140e0c9093aaa5240e6252fe9e00
> Cr-Commit-Position: refs/heads/master@{#421894}

TBR=nednguyen@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review-Url: https://codereview.chromium.org/2386583002
Cr-Commit-Position: refs/heads/master@{#422070}
1 file changed