message: only use only context in chrome >= 72
  because of a bug loading blobs in Chrome 71:
diff: @@ -38,7 +38,7 @@ define(["helper/ua-parser"], function(UserAgentParser){
  //has float time domain analyser
  ANALYZE_FLOAT_TIME_DOMAIN : AnalyserNode && typeof AnalyserNode.prototype.getFloatTimeDomainData === "function",
  //if the tests run in focus
  - ONLINE_TESTING : false,
  + ONLINE_TESTING : is("Chrome", 72),
  //the close method resolves a promise
  AUDIO_CONTEXT_CLOSE_RESOLVES : isnt("Firefox") && isnt("Safari", 10),
  //if it supports gUM testing
  