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

third_party/WebKit/LayoutTests/media/video-dom-src.html

Index: third_party/WebKit/LayoutTests/media/video-dom-src.html
diff --git a/third_party/WebKit/LayoutTests/media/video-dom-src.html b/third_party/WebKit/LayoutTests/media/video-dom-src.html
index 0abdf7e0c131795ffcd1740940569866fcdd82c9..2b681cf2c06d741af535c09844db4a3588a07b67 100644
--- a/third_party/WebKit/LayoutTests/media/video-dom-src.html
+++ b/third_party/WebKit/LayoutTests/media/video-dom-src.html
@@ -1,5 +1,7 @@
 <video controls></video>
 <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>
     testExpected("video.currentSrc", "");
@@ -7,10 +9,10 @@
     video.src = mediaFile;
     testExpected("video.currentSrc", "");
 
-    waitForEvent('canplaythrough', function () { 
+    waitForEvent('canplaythrough', function () {
         testExpected("stripExtension(relativeURL(video.currentSrc))", stripExtension(mediaFile));
         endTest();
     } );
-    
+
     video.load();
 </script>