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

third_party/WebKit/LayoutTests/fast/canvas/script-tests/canvas-path-context-stroke.js

-description("Series of tests to ensure stroke() works with optional path parameter.");
-
-var ctx = document.getElementById('canvas').getContext('2d');
-
-function pixelDataAtPoint() {
-  return ctx.getImageData(75, 75, 1, 1).data;
-}
-
-function checkResult(expectedColors, sigma) {
-    for (var i = 0; i < 4; i++)
-      shouldBeCloseTo("pixelDataAtPoint()[" + i + "]", expectedColors[i], sigma);
-}
-
-function drawRectangleOn(contextOrPath) {
-  contextOrPath.rect(25, 25, 50, 50);
-}
-
-function formatName(path) {
-  return 'stroke(' + (path ? 'path' : '') + ')';
-}
-
-function testStrokeWith(path) {
-    debug('Testing ' + formatName(path));
-    ctx.fillStyle = 'rgb(255,0,0)';
-    ctx.beginPath();
-    ctx.fillRect(0, 0, 100, 100);
-    ctx.strokeStyle = 'rgb(0,255,0)';
-    ctx.lineWidth = 5;
-    if (path) {
-      ctx.stroke(path);
-    } else {
-      ctx.beginPath();
-      drawRectangleOn(ctx);
-      ctx.stroke();
-    }
-    debug('');
-    checkResult([0, 255, 0, 255], 5);
-}
-
-// Execute test.
-function prepareTestScenario() {
-    var path = new Path2D();
-    drawRectangleOn(path);
-
-    testStrokeWith();
-    testStrokeWith(path);
-
-    // Test exception cases.
-    shouldThrow("ctx.stroke(null)");
-    shouldThrow("ctx.stroke(undefined)");
-    shouldThrow("ctx.stroke([])");
-    shouldThrow("ctx.stroke({})");
-}
-
-// Run test and allow variation of results.
-prepareTestScenario();