Convert Oscillator Audit tests to testharness

third_party/WebKit/LayoutTests/webaudio/resources/late-start-testing.js

Index: third_party/WebKit/LayoutTests/webaudio/resources/late-start-testing.js
diff --git a/third_party/WebKit/LayoutTests/webaudio/resources/late-start-testing.js b/third_party/WebKit/LayoutTests/webaudio/resources/late-start-testing.js
index eca771f88876aa70c8b1b338a8afd2cbd73cf43b..49baebb7e21f682b4e377604bc66f2d0f032102c 100644
--- a/third_party/WebKit/LayoutTests/webaudio/resources/late-start-testing.js
+++ b/third_party/WebKit/LayoutTests/webaudio/resources/late-start-testing.js
@@ -43,19 +43,9 @@ function runLateStartTest(audit, context, node) {
       Should('The rendered buffer', success)
           .summarize('contains non-zero values after the first sample',
                      'was all zeros or has non-zero first sample.');
-
       done();
     });
   });
 
-  audit.defineTask('finish-test', function (done) {
-    done();
-    finishJSTest();
-  });
-
-  audit.runTasks(
-    'test-late-start',
-    'finish-test'
-  );
-
+  audit.runTasks();
 }