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

third_party/WebKit/LayoutTests/fast/canvas/script-tests/canvas-to-canvas.js

-description("Test to ensure that canvas-to-canvas drawImage after a stroked rect works correctly.");
-var canvas = document.createElement('canvas');
-var ctx = canvas.getContext('2d');
-
-ctx.lineWidth = 10;
-ctx.beginPath();
-ctx.strokeStyle = 'green';
-ctx.strokeRect(0, 0, 100, 100);
-
-var ctx2 = document.createElement('canvas').getContext('2d');
-
-ctx2.fillStyle = 'red';
-ctx2.fillRect(0, 0, 100, 100);
-ctx2.drawImage(canvas, 0, 0);
-var imageData = ctx2.getImageData(0, 0, 1, 1);
-var imgdata = imageData.data;
-shouldBe("imgdata[0]", "0");
-shouldBe("imgdata[1]", "128");
-shouldBe("imgdata[2]", "0");