Expose Resource Timing methods and attribute in workers

LayoutTests/http/tests/workers/resources/performance-timeline-worker.js

 importScripts('../../resources/testharness.js');
 
 promise_test(function(test) {
     var durationMsec = 100;
 
     return new Promise(function(resolve) {
         performance.mark('startMark');
         setTimeout(resolve, durationMsec);
       }).then(function() {
           performance.mark('endMark');
@@ skipping 25 matching lines @@
       .then(function(t) {
           var expectedResources = ['/resources/testharness.js', '/resources/dummy.txt'];
           assert_equals(performance.getEntriesByType('resource').length, expectedResources.length);
           for (var i = 0; i < expectedResources.length; i++) {
               var entry = performance.getEntriesByType('resource')[i];
               assert_true(entry.name.endsWith(expectedResources[i]));
               assert_equals(entry.workerStart, 0);
               assert_greater_than(entry.startTime, 0);
               assert_greater_than(entry.responseEnd, entry.startTime);
           }
-        });
+          return new Promise(function(resolve) {
+              performance.onwebkitresourcetimingbufferfull = resolve;
+              performance.webkitSetResourceTimingBufferSize(expectedResources.length);

[kinuko, 2015/06/24 07:11:26]

omg... ok so they're also prefixed on window.

+            });
+        })
+      .then(function() {
+          performance.webkitClearResourceTimings();
+          assert_equals(performance.getEntriesByType('resource').length, 0);
+        })
   }, 'Resource Timing');
 
 done();