Allow flash requests to be detected. For https://webarchive.jira.com/browse/ARI-3724

It looks like requests generated for flash aren't detected by the chromium debugger protocol. You can see this behaviour by opening chromium, going to a flash site, and checking the dev tools windows for swf requests. There aren't any. Adding "--disable-direct-npapi-requests" (described at https://code.google.com/p/chromium/issues/detail?id=319203) allows these requests to be detected.