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

third_party/WebKit/LayoutTests/media/video-error-does-not-exist.html

Index: third_party/WebKit/LayoutTests/media/video-error-does-not-exist.html
diff --git a/third_party/WebKit/LayoutTests/media/video-error-does-not-exist.html b/third_party/WebKit/LayoutTests/media/video-error-does-not-exist.html
index 35015bc502821e9ff273f6b203cbdf9a6d202722..657738277a323b5e9738e17a305d282c750acaf7 100644
--- a/third_party/WebKit/LayoutTests/media/video-error-does-not-exist.html
+++ b/third_party/WebKit/LayoutTests/media/video-error-does-not-exist.html
@@ -1,5 +1,7 @@
 <p>Test that the media element is in correct state after load fails.</p>
 <video controls></video>
+<!-- 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>
 
@@ -7,13 +9,13 @@
     testExpected("video.error", null);
 
     waitForEventAndTest("canplaythrough", "false");
-    
+
     waitForEvent("error", function () {
         testExpected("video.error", null, "!=");
         testExpected("video.error.code", MediaError.MEDIA_ERR_SRC_NOT_SUPPORTED);
-    
+
         testExpected("video.networkState", HTMLMediaElement.NETWORK_NO_SOURCE);
-    
+
         testExpected("isNaN(video.duration)", true);
         testExpected("video.currentTime", 0);
         testExpected("video.buffered.length", 0);
@@ -21,7 +23,7 @@
         testExpected("video.buffered.length", 0);
         endTest();
     });
-    
+
     video.src = "content/does-not-exist.mpeg";
     consoleWrite("");
 </script>