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

third_party/WebKit/LayoutTests/fast/canvas/alpha.js

-description("Series of tests for canvas alpha");
-
-if (window.testRunner)
-    testRunner.dumpAsTextWithPixelResults();
-
-var canvas1 = document.getElementById("canvas1");
-var canvas2 = document.getElementById("canvas2");
-var canvas3 = document.getElementById("canvas3");
-var canvas4 = document.getElementById("canvas4");
-
-var ctx1 = canvas1.getContext("2d");
-var ctx2 = canvas2.getContext("2d", {} );
-var ctx3 = canvas3.getContext("2d", { alpha: false } );
-var ctx4 = canvas4.getContext("2d", { alpha: true } );
-
-shouldBe("ctx1.getContextAttributes().alpha", "true");
-var imgData1 = ctx1.getImageData(0, 0, 1, 1);
-shouldBe("imgData1.data[0]", "0");
-shouldBe("imgData1.data[1]", "0");
-shouldBe("imgData1.data[2]", "0");
-shouldBe("imgData1.data[3]", "0");
-
-shouldBe("ctx2.getContextAttributes().alpha", "true");
-var imgData2 = ctx2.getImageData(0, 0, 1, 1);
-shouldBe("imgData2.data[0]", "0");
-shouldBe("imgData2.data[1]", "0");
-shouldBe("imgData2.data[2]", "0");
-shouldBe("imgData2.data[3]", "0");
-
-shouldBe("ctx3.getContextAttributes().alpha", "false");
-
-shouldBe("ctx4.getContextAttributes().alpha", "true");
-var imgData4 = ctx4.getImageData(0, 0, 1, 1);
-shouldBe("imgData4.data[0]", "0");
-shouldBe("imgData4.data[1]", "0");
-shouldBe("imgData4.data[2]", "0");
-shouldBe("imgData4.data[3]", "0");
-
-// Check that mutating the returned value of getContextAttributes() doesn't
-// affect the existing canvas, or the values of subsequent calls to
-// getContextAttributes().
-var attrs = ctx4.getContextAttributes();
-shouldBe("attrs.alpha", "true");
-attrs.alpha = false;
-var imgData4 = ctx4.getImageData(0, 0, 1, 1);
-shouldBe("ctx4.getContextAttributes().alpha", "true");
-shouldBe("imgData4.data[0]", "0");
-shouldBe("imgData4.data[1]", "0");
-shouldBe("imgData4.data[2]", "0");
-shouldBe("imgData4.data[3]", "0");