add suppression for race on on BrowserMainLoop::ShutdownThreadsAndCleanUp TBR=jam@chromium.org BUG=118319 test=waterfall.sh
add suppression for race on on BrowserMainLoop::ShutdownThreadsAndCleanUp
TBR=jam@chromium.org
BUG=118319
test=waterfall.sh

Review URL: https://chromiumcodereview.appspot.com/9702060

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@126825 0039d316-1c4b-4281-b951-d872f2087c98

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