This test currently takes 288 seconds to fail if output values are wrong; there's no point to print the failure hundreds of times. This change will exit the test early. R=henrika@webrtc.org BUG=623538 NOTRY=true Review-Url: https://codereview.webrtc.org/2097363002 Cr-Commit-Position: refs/heads/master@{#13295}