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

third_party/WebKit/LayoutTests/fast/canvas/canvas-toDataURL-crash.html

Index: third_party/WebKit/LayoutTests/fast/canvas/canvas-toDataURL-crash.html
diff --git a/third_party/WebKit/LayoutTests/fast/canvas/canvas-toDataURL-crash.html b/third_party/WebKit/LayoutTests/fast/canvas/canvas-toDataURL-crash.html
index 703600d2c027c5d6690ad709804d5ae0f2d5c7f4..8e1248ef6cf897781de627405465b0ac428d4c1a 100644
--- a/third_party/WebKit/LayoutTests/fast/canvas/canvas-toDataURL-crash.html
+++ b/third_party/WebKit/LayoutTests/fast/canvas/canvas-toDataURL-crash.html
@@ -1,11 +1,10 @@
-<p id="console"></p>
-<p>Calling toDataURL() on a huge canvas shouldn't crash.  If the text above is "PASS", the test passed.</p>
-<canvas id="foo" width="65536" height="65536"></canvas>
+<script src="../../resources/testharness.js"></script>
+<script src="../../resources/testharnessreport.js"></script>
+
+<canvas><canvas id="foo" width="65536" height="65536"></canvas>
 <script>
-var canvas = document.getElementById('foo');
-var url = canvas.toDataURL();
-var p = document.getElementById('console');
-p.innerHTML = "PASS";
-if (window.testRunner)
-  testRunner.dumpAsText();
+test(function() {
+    var canvas = document.getElementById('foo');
+    var url = canvas.toDataURL();
+}, "Calling toDataURL() on a huge canvas shouldn't crash.");
 </script>