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

third_party/WebKit/LayoutTests/fast/canvas/script-tests/canvas-frameless-document-text.js

-description("This verifies that the browser does not crash when drawing text to a canvas in a frame-less document.");
-
-// It is not clear from the spec whether this is supposed to work and how.
-// Therefore, we do not validate the rendering results. We just make sure
-// this does not crash the browser.
-var canvas1 = document.createElement('canvas');
-var ctx1 = canvas1.getContext('2d');
-var htmlDoc = document.implementation.createHTMLDocument('', '', null);
-htmlDoc.adoptNode(canvas1);
-var canvas2 = htmlDoc.createElement('canvas');
-var ctx2 = canvas2.getContext('2d');
-
-ctx1.font = 'italic 30px Arial';
-ctx2.font = 'italic 30px Arial';
-ctx1.fillText('Text1', 0, 30);
-ctx2.fillText('Text1', 0, 30);
-ctx1.strokeText('Text2', 0, 60);
-ctx2.strokeText('Text2', 0, 60);
-ctx1.measureText('Text3');
-ctx2.measureText('Text3');