Don't try to measure the running time if the test hasn't started yet.
Don't try to measure the running time if the test hasn't started yet.

Review URL: https://codereview.chromium.org//13814017

git-svn-id: b889c0189f1adfea19efba192a3d7a5b889e4120@21163 260f80e4-7a28-3924-810f-c04153c831b5

grouma/test,Pacane/test,grouma/test,d2m/test,iglherme/Guttiest,apwilson/test,apwilson/test,greglittlefield-wf/test,apwilson/test,greglittlefield-wf/test,d2m/test,greglittlefield-wf/test,kevmoo/test,iglherme/Guttiest,d2m/test,kevmoo/test,Pacane/test,iglherme/Guttiest,kevmoo/test,grouma/test