Revert of Revert blacklist part of crrev.com/250682. (https://codereview.chromium.org/160373002/)

Reason for revert:
As discussed, this shouldn't interfere with the metrics we care about.

Original issue's description:
> Revert blacklist part of crrev.com/250682.
> 
> Don't want the new check in just yet, it will interfere with metrics.
> 
> BUG=329023
> TBR=csharp
> NOTRY=true
> NOTREECHECKS=TRUE
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=250704

TBR=csharp@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=329023

Review URL: https://codereview.chromium.org/160643002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@250758 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 250758