Unflaky inspector/timeline/timeline-receive-response-event.html

BUG=389286
TBR=yurys@chromium.org, timloh@chromium.org, fmalita@chromium.org

Review URL: https://codereview.chromium.org/361463002

git-svn-id: svn://svn.chromium.org/blink/trunk@177112 bbb929c8-8fbe-4397-9dbb-9b2b20218538