chore(Travis): Increase browserNoActivityTimeout to prevent build failures

Author: vicb

karma.conf.js

@@ -27,8 +27,8 @@ module.exports = function(config) {
 
     // If browser does not capture in given timeout [ms], kill it
     captureTimeout: 20000,
-    // 5 minutes is enough time for dart2js to run on Travis...
-    browserNoActivityTimeout: 300000,
+    // Time for dart2js to run on Travis... [ms]
+    browserNoActivityTimeout: 900000,
 
     plugins: [
       'karma-dart',