Fix valgrind-caught memory leak in TaskManagerUnittest
Fix valgrind-caught memory leak in TaskManagerUnittest

TEST=none
BUG=none

Review URL: http://codereview.chromium.org/276003

git-svn-id: http://src.chromium.org/svn/trunk/src@28860 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: fe0ffdf4a156c5d50234e0be8ae81c962f2664ff
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