TSAN: Suppress a race in PrintJobTest.SimplePrint.

BUG=344704
NOTRY=true
TBR=vitalybuka@chromium.org

Review URL: https://codereview.chromium.org/171673003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251893 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 251893