Suppress a data race on ObserverListBase<>::Iterator in sync tests BUG=62880 TBR=glider TEST=TSan/Linux should go green Review URL: http://codereview.chromium.org/5179004
Suppress a data race on ObserverListBase<>::Iterator in sync tests
BUG=62880
TBR=glider
TEST=TSan/Linux should go green
Review URL: http://codereview.chromium.org/5179004

git-svn-id: http://src.chromium.org/svn/trunk/src@66764 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: b6ac79dd7c2ead2c40ffbd5efd807bb099c92da9
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