Clean-up: Remove TSAN suppression from long-resolved bug.

BUG=131001,123112
TBR=xians

Review URL: https://codereview.chromium.org/101693011

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@242983 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 242983