don't print Chrome output

.travis.yml

@@ -31,7 +31,7 @@ before_install:
   - export GOARCH=$TRAVIS_GOARCH
   - go env # for debugging
   - "export DISPLAY=:99.0"
-  - "Xvfb $DISPLAY &"
+  - "Xvfb $DISPLAY &> /dev/null &"
 
 script:
   - .travis/script.sh

integrationtests/chrome/chrome_suite_test.go

@@ -142,7 +142,7 @@ func chromeTestImpl(version protocol.VersionNumber, url string, blockUntilDone f
 	}
 	utils.Infof("Running chrome: %s '%s'", getChromePath(), strings.Join(args, "' '"))
 	command := exec.Command(path, args...)
-	session, err := gexec.Start(command, GinkgoWriter, GinkgoWriter)
+	session, err := gexec.Start(command, nil, nil)
 	Expect(err).NotTo(HaveOccurred())
 	defer session.Kill()
 	const pollInterval = 100 * time.Millisecond