Add TODOs to convert from video-test.js to testharness.js

third_party/WebKit/LayoutTests/media/track/track-webvtt-tc004-magic-header.html

Index: third_party/WebKit/LayoutTests/media/track/track-webvtt-tc004-magic-header.html
diff --git a/third_party/WebKit/LayoutTests/media/track/track-webvtt-tc004-magic-header.html b/third_party/WebKit/LayoutTests/media/track/track-webvtt-tc004-magic-header.html
index 18998c57aac90a6859eff249fbd4618ae02132f3..e7c39dcf18549e64b7958701101c91dc10c912a3 100644
--- a/third_party/WebKit/LayoutTests/media/track/track-webvtt-tc004-magic-header.html
+++ b/third_party/WebKit/LayoutTests/media/track/track-webvtt-tc004-magic-header.html
@@ -4,11 +4,13 @@
         <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
 
         <script src=../media-file.js></script>
+        <!-- TODO(philipj): Convert test to testharness.js. crbug.com/588956
+             (Please avoid writing new tests using video-test.js) -->
         <script src=../video-test.js></script>
-        <script>            
+        <script>
 
             numberOfTrackTests = 3;
-            
+
             function trackLoaded()
             {
                 numberOfTracksLoaded++;
@@ -18,11 +20,11 @@
                     testTrackError(2);
                 }
             }
-            
+
             function testTrack(i)
             {
                 findMediaElement();
-                var expected = 
+                var expected =
                 {
                     length : 2,
                     tests:
@@ -49,11 +51,11 @@
 
                 allTestsEnded();
             }
-            
+
             function testTrackError(i)
             {
                 findMediaElement();
-                var expected = 
+                var expected =
                 {
                     length : 0,
                     tests:
@@ -73,4 +75,4 @@
             <track src="captions-webvtt/tc004-no-webvtt.vtt" onerror="trackLoaded()">
         </video>
     </body>
-</html>
+</html>