More logging.

lib/roles/device/plugins/browser.js

@@ -69,6 +69,7 @@ module.exports = syrup.serial()
         })
 
         router.on(wire.BrowserClearMessage, function(channel, message) {
+          log.info('Clearing "%s"', message.browser)
           var reply = wireutil.reply(options.serial)
           adb.clear(options.serial, pkg(message.browser))
             .then(function() {