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

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

-description("Series of tests to ensure correct behavior of canvas.clearRect().");
-var ctx = document.createElement('canvas').getContext('2d');
-
-// Clear rect with height = width = 0.
-debug("Test canvas.clearRect() with height = width = 0.");
-ctx.fillStyle = 'red';
-ctx.fillRect(0, 0, 1, 1);
-ctx.clearRect(0, 0, 0, 0);
-
-var imageData = ctx.getImageData(0, 0, 1, 1);
-var imgdata = imageData.data;
-shouldBe("imgdata[0]", "255");
-shouldBe("imgdata[1]", "0");
-shouldBe("imgdata[2]", "0");
-
-ctx.clearRect(0, 0, 1, 1);
-
-// Clear rect with height = 0, width = 1.
-debug("Test canvas.clearRect() with height = 0, width = 1.");
-ctx.fillStyle = 'red';
-ctx.fillRect(0, 0, 1, 1);
-ctx.clearRect(0, 0, 1, 0);
-
-var imageData = ctx.getImageData(0, 0, 1, 1);
-var imgdata = imageData.data;
-shouldBe("imgdata[0]", "255");
-shouldBe("imgdata[1]", "0");
-shouldBe("imgdata[2]", "0");
-
-ctx.clearRect(0, 0, 1, 1);
-
-// Clear rect with height = 1, width = 0.
-debug("Test canvas.clearRect() with height = 1, width = 0.");
-ctx.fillStyle = 'red';
-ctx.fillRect(0, 0, 1, 1);
-ctx.clearRect(0, 0, 0, 1);
-
-var imageData = ctx.getImageData(0, 0, 1, 1);
-var imgdata = imageData.data;
-shouldBe("imgdata[0]", "255");
-shouldBe("imgdata[1]", "0");
-shouldBe("imgdata[2]", "0");
-
-ctx.clearRect(0, 0, 1, 1);