Convert some repaint tests to not call display()

LayoutTests/fast/canvas/script-tests/canvas-imageSmoothingEnabled-repaint.js

 // This is a regression test for bug https://bugs.webkit.org/show_bug.cgi?id=89018
 
 description("Tests that disabling the imageSmoothingEnabled attribute still works after multiple repaints");
 var dstCanvas = document.getElementById("destination");
 var dstCtx = dstCanvas.getContext('2d');
 var srcCanvas = document.getElementById("source");
 var srcCtx = srcCanvas.getContext('2d');
 
 
 var srcCanvas, srcCtx, dstCanvas, dstCtx;
 
 function draw()
 {
     srcCtx.clearRect(0, 0, 300, 300);
     dstCtx.clearRect(0, 0, 300, 300);
     srcCtx.fillStyle = "rgb(255, 0, 0)";
     srcCtx.fillRect(0, 0, 1, 1);
     srcCtx.fillStyle = "rgb(0, 255, 0)";
     srcCtx.fillRect(1, 0, 1, 1);
     dstCtx.imageSmoothingEnabled = false;
     dstCtx.drawImage(srcCanvas, 0, 0, 2, 1, 0, 0, 300, 300);
 }
 
 function testResult() {
     debug("Test that the image is not filtered");
-        left_of_center_pixel = dstCtx.getImageData(149, 150, 1, 1);
-        shouldBe("left_of_center_pixel.data[0]", "255");
-        shouldBe("left_of_center_pixel.data[1]", "0");
-        shouldBe("left_of_center_pixel.data[2]", "0");
-        right_of_center_pixel = dstCtx.getImageData(150, 150, 1, 1);
-        shouldBe("right_of_center_pixel.data[0]", "0");
-        shouldBe("right_of_center_pixel.data[1]", "255");
-        shouldBe("right_of_center_pixel.data[2]", "0");
+    left_of_center_pixel = dstCtx.getImageData(149, 150, 1, 1);
+    shouldBe("left_of_center_pixel.data[0]", "255");
+    shouldBe("left_of_center_pixel.data[1]", "0");
+    shouldBe("left_of_center_pixel.data[2]", "0");
+    right_of_center_pixel = dstCtx.getImageData(150, 150, 1, 1);
+    shouldBe("right_of_center_pixel.data[0]", "0");
+    shouldBe("right_of_center_pixel.data[1]", "255");
+    shouldBe("right_of_center_pixel.data[2]", "0");
     finishJSTest();
 }
 
 // Bug 89018 requires 2 draw iteration in order to manifest itself.
 var drawIterations = 2;
 
-// Unrolled repaint loop for running the test in DumpRenderTree
-function TestControllerPaint() {
-    while (drawIterations > 0) {
-        draw();
-        testRunner.display();
-        drawIterations = drawIterations - 1;
-    }
-    draw();
-    testResult();
-}
-
-// Repaint loop for running the test in the browser
 function BrowserPaint(){
     draw();
-        if (drawIterations > 0) {
-                drawIterations = drawIterations - 1;
-                window.requestAnimationFrame(BrowserPaint);
+    if (drawIterations > 0) {
+        drawIterations = drawIterations - 1;
+        window.requestAnimationFrame(BrowserPaint);
     } else {
-            testResult();
-        }
+        testResult();
+    }
 }
 
 function onLoadHandler()
 {
-    if (window.testRunner) {
-        TestControllerPaint();
-    } else {
-        BrowserPaint();
-    }
+    BrowserPaint();
 }
 
 window.jsTestIsAsync = true;
 window.onload = onLoadHandler;