Tweaks layoutTests to use eventSender.setTouchPointRadius correctly

LayoutTests/fast/events/touch/touch-browser-zoom-scales-radius.html

Index: LayoutTests/fast/events/touch/touch-browser-zoom-scales-radius.html
diff --git a/LayoutTests/fast/events/touch/touch-browser-zoom-scales-radius.html b/LayoutTests/fast/events/touch/touch-browser-zoom-scales-radius.html
index da82ad3ba89ea3f94d84f4da7847e2b8e9dd8b5c..2fa8584d5fc2c7b291386debebfc1215bf54f3c8 100644
--- a/LayoutTests/fast/events/touch/touch-browser-zoom-scales-radius.html
+++ b/LayoutTests/fast/events/touch/touch-browser-zoom-scales-radius.html
@@ -21,7 +21,9 @@
       function sendTouchStart(x, y, radiusX, radiusY)
       {
         eventSender.clearTouchPoints();
-        eventSender.addTouchPoint(x, y, radiusX, radiusY);
+        eventSender.addTouchPoint(x, y);
+        if (eventSender.setTouchPointRadius)
+          eventSender.setTouchPointRadius(0, radiusX, radiusY, false);
         eventSender.touchStart();
       }
 
@@ -37,22 +39,28 @@
 
           debug("===Initial Zoom===");
           sendTouchStart(100, 100, 4, 10);
-          shouldBe("radiusX", "4");
-          shouldBe("radiusY", "10");
+          if (eventSender.setTouchPointRadius) {
+            shouldBe("radiusX", "4");
+            shouldBe("radiusY", "10");
+          }
 
           window.internals.setZoomFactor(2.0);
 
           debug("===Zoom 2X===");
           sendTouchStart(100, 100, 4, 10);
-          shouldBe("radiusX", "2");
-          shouldBe("radiusY", "5");
+          if (eventSender.setTouchPointRadius) {
+            shouldBe("radiusX", "2");
+            shouldBe("radiusY", "5");
+          }
 
           window.internals.setZoomFactor(0.5);
 
           debug("===Zoom 0.5X===");
           sendTouchStart(100, 100, 4, 10);
-          shouldBe("radiusX", "8");
-          shouldBe("radiusY", "20");
+          if (eventSender.setTouchPointRadius) {
+            shouldBe("radiusX", "8");
+            shouldBe("radiusY", "20");
+          }
 
 
           endTest();