The lightweight tester no longer runs tests if a nexe fails to load.
The lightweight tester no longer runs tests if a nexe fails to load.

Async tests have the tendancy to time out rather than throw an exception, so
running tests we know will fail is wasting time.

BUG= http://code.google.com/p/nativeclient/issues/detail?id=1649
TEST= ./scons chrome_browser_tests  (modify one to fail)

Review URL: http://codereview.chromium.org/7150021

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@5648 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

sbc100/native_client,sbc100/native_client,sbc100/native_client,nacl-webkit/native_client,nacl-webkit/native_client,sbc100/native_client,nacl-webkit/native_client,nacl-webkit/native_client,nacl-webkit/native_client,sbc100/native_client,sbc100/native_client