Fix some leaks in observer_list_unittest
Fix some leaks in observer_list_unittest

Review URL: http://codereview.chromium.org/16505

git-svn-id: http://src.chromium.org/svn/trunk/src@7551 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: ee2a5f065075c64fe6c360b88f4fd5058af7272b
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