test(*): update karma chrome headless config

travis-ci/docs-travis-ci-com#1671

Author: christopherthielen

karma.conf.js

@@ -77,7 +77,10 @@ module.exports = function(config) {
 
     // Start these browsers, currently available:
     // Chrome, ChromeCanary, Firefox, Opera, Safari, PhantomJS
-    browsers: ['ChromeHeadless'],
+    browsers: ['ChromeHeadlessNoSandbox'],
+    customLaunchers: {
+      ChromeHeadlessNoSandbox: { base: 'ChromeHeadless', flags: ['--no-sandbox'] }
+    },
 
     frameworks: ['jasmine'],