suppress handle leaks from base.dll!base::`anonymous namespace'::ThreadFunc
TBR=dsinclair@chromium.org
BUG=346993

Review URL: https://codereview.chromium.org/180243007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@253330 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 253330