Print out label and description on task entry in Audit task runner

third_party/WebKit/LayoutTests/webaudio/resources/audit.js

Index: third_party/WebKit/LayoutTests/webaudio/resources/audit.js
diff --git a/third_party/WebKit/LayoutTests/webaudio/resources/audit.js b/third_party/WebKit/LayoutTests/webaudio/resources/audit.js
index 7e732952a3968ed6ea2c9586d92c71a9b353ce83..cf1cfb7f1c51f8bb53796bc8bbbb727b4c06470d 100644
--- a/third_party/WebKit/LayoutTests/webaudio/resources/audit.js
+++ b/third_party/WebKit/LayoutTests/webaudio/resources/audit.js
@@ -934,11 +934,10 @@ window.Audit = (function () {
     }
 
     // Set the description of this task. This is printed out in the test
-    // result.
+    // result right after the task starts.
     describe (message) {
       this._description = message;
-      _logPassed('> [' + this._label + '] '
-          + this._description);
+      _logPassed('  : ' + this._description);
     }
 
     get state () {
@@ -962,6 +961,7 @@ window.Audit = (function () {
     // task function.
     run () {
       this._state = TaskState.STARTED;
+      _logPassed('> [' + this._label + '] task started.');

[Raymond Toy, 2017/02/16 21:50:40]

I think I'd prefer nothing be printed.  Because what you have now is
indistinguishable from a task description of "task started.".  (Granted, you
could also have a description of "", but that seems much less likely.)

[hongchan, 2017/02/16 23:54:49]

If your description is undefined or null, you'll get nothing.

       this._taskFunction(
           this,
           this.should.bind(this));