Suppress a leak detected after some WorkerTests are enabled. 
Suppress a leak detected after some WorkerTests are enabled. 

TBR=paul
BUG=22923
Review URL: http://codereview.chromium.org/235006

git-svn-id: http://src.chromium.org/svn/trunk/src@27080 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: caaf2dc9cbc7cc199fd2cb9a6a5b80882c0e6448
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser