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

third_party/WebKit/LayoutTests/fast/canvas/script-tests/canvas-getImageData-invalid.js

-description("Test the handling of invalid arguments in canvas getImageData().");
-
-ctx = document.createElement('canvas').getContext('2d');
-
-shouldThrow("ctx.getImageData(NaN, 10, 10, 10)");
-shouldThrow("ctx.getImageData(10, NaN, 10, 10)");
-shouldThrow("ctx.getImageData(10, 10, NaN, 10)");
-shouldThrow("ctx.getImageData(10, 10, 10, NaN)");
-shouldThrow("ctx.getImageData(Infinity, 10, 10, 10)");
-shouldThrow("ctx.getImageData(10, Infinity, 10, 10)");
-shouldThrow("ctx.getImageData(10, 10, Infinity, 10)");
-shouldThrow("ctx.getImageData(10, 10, 10, Infinity)");
-shouldThrow("ctx.getImageData(undefined, 10, 10, 10)");
-shouldThrow("ctx.getImageData(10, undefined, 10, 10)");
-shouldThrow("ctx.getImageData(10, 10, undefined, 10)");
-shouldThrow("ctx.getImageData(10, 10, 10, undefined)");
-shouldThrow("ctx.getImageData(10, 10, 0, 10)");
-shouldThrow("ctx.getImageData(10, 10, 10, 0)");