Refactor prepareToMeasureValuesAsync to startMeasureValuesAsyn which run test through callback

third_party/WebKit/PerformanceTests/Bindings/resources/structured-clone-perf-test.js

 const StructuredClonePerfTestRunner = (function() {
   function pingPong(data) {
     return new Promise((resolve, reject) => {
       let beginSerialize, endSerialize, beginDeserialize;
       window.addEventListener('message', function listener(e) {
         try {
           e.data;  // Force deserialization.
           const endDeserialize = PerfTestRunner.now();
           window.removeEventListener('message', listener);
           resolve([endSerialize - beginSerialize, endDeserialize - beginDeserialize]);
@@ skipping 10 matching lines @@
 
   return {
     measureTimeAsync(test) {
       let isDone = false;
       PerfTestRunner.prepareToMeasureValuesAsync({
         description: test.description,
         unit: 'ms',
         warmUpCount: test.warmUpCount || 10,
         iterationCount: test.iterationCount || 250,
         done() { isDone = true; },
+        run() { },

[Xianzhu, 2017/05/03 22:06:26]

Change this line to
  run: pingPongUtilDone,
and remove line 44.

[nednguyen, 2017/05/04 00:10:32]

Done. Nice catch!

       });
 
       function pingPongUntilDone() {
         pingPong(test.data).then(([serializeTime, deserializeTime]) => {
           console.log([serializeTime, deserializeTime]);
           if (test.measure === 'serialize')
             PerfTestRunner.measureValueAsync(serializeTime);
           else if (test.measure === 'deserialize')
             PerfTestRunner.measureValueAsync(deserializeTime);
           if (!isDone) pingPongUntilDone();
         });
       }
       pingPongUntilDone();
     },
   };
 })();