Disable SessionLengthLimiterTest.RunWithUserActivityWhileNotWaiting

TBR=bartfab,satorux

BUG=327445

Review URL: https://codereview.chromium.org/110633003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@239854 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 239854