Use testharness.js instead of js-test.js in LayoutTests/fast/canvas tests.

third_party/WebKit/LayoutTests/fast/canvas/bug503422.html

Index: third_party/WebKit/LayoutTests/fast/canvas/bug503422.html
diff --git a/third_party/WebKit/LayoutTests/fast/canvas/bug503422.html b/third_party/WebKit/LayoutTests/fast/canvas/bug503422.html
index 67209cfae51a1d6c41a071d63d50a5646624e1b9..60dbdb712e55b4d8610cc087108b88b68f9c2184 100644
--- a/third_party/WebKit/LayoutTests/fast/canvas/bug503422.html
+++ b/third_party/WebKit/LayoutTests/fast/canvas/bug503422.html
@@ -1,10 +1,10 @@
-<p>Regression test for crbug.com/503422. Test passes by not crashing.</p>
+<script src="../../resources/testharness.js"></script>
+<script src="../../resources/testharnessreport.js"></script>
 <canvas id=mycanvas width=400 height=400</script>
 <script>
-if (window.testRunner) {
-    testRunner.dumpAsText();
-}
-var canvas = document.getElementById('mycanvas');
-var ctx = canvas.getContext('2d');
-ctx.ellipse(80, 0, 10, 4294967277, Math.PI / -84, -Math.PI / 2147483436, false);
+test(function(t) {
+    var canvas = document.getElementById('mycanvas');
+    var ctx = canvas.getContext('2d');
+    ctx.ellipse(80, 0, 10, 4294967277, Math.PI / -84, -Math.PI / 2147483436, false);
+}, 'Regression test for crbug.com/503422. Test passes by not crashing.');
 </script>