[SVG2] Add onbegin, onend and onrepeat EventHandlers on SVGAnimationElement

LayoutTests/fast/svg/script-tests/animation-events.js

 function getObject(interface) {
     switch(interface) {
-        case "Element":
-            var e = document.createElementNS("http://example.com/", "example");
-            assert_true(e instanceof Element);
-            assert_false(e instanceof HTMLElement);
-            assert_false(e instanceof SVGElement);
+        case "SVGAnimateElement":
+            var e = document.createElementNS("http://www.w3.org/2000/svg", "animate");
+            assert_true(e instanceof SVGAnimateElement);
             return e;
-        case "HTMLElement":
-            var e = document.createElement("html");
-            assert_true(e instanceof HTMLElement);
+        case "SVGAnimateMotionElement":
+            var e = document.createElementNS("http://www.w3.org/2000/svg", "animateMotion");
+            assert_true(e instanceof SVGAnimateMotionElement);
             return e;
-        case "HTMLBodyElement":
-            var e = document.createElement("body");
-            assert_true(e instanceof HTMLBodyElement);
+        case "SVGAnimateTransformElement":
+            var e = document.createElementNS("http://www.w3.org/2000/svg", "animateTransform");
+            assert_true(e instanceof SVGAnimateTransformElement);
             return e;
-        case "HTMLFormElement":
-            var e = document.createElement("form");
-            assert_true(e instanceof HTMLFormElement);
+        case "SVGSetElement":
+            var e = document.createElementNS("http://www.w3.org/2000/svg", "set");
+            assert_true(e instanceof SVGSetElement);
             return e;
-        case "HTMLFrameSetElement":
-            var e = document.createElement("frameset");
-            assert_true(e instanceof HTMLFrameSetElement);
-            return e;
-        case "SVGElement":
-            var e = document.createElementNS("http://www.w3.org/2000/svg", "rect");
-            assert_true(e instanceof SVGElement);
-            return e;
-        case "Document":
-            assert_true(document instanceof Document);
-            return document;
-        case "Window":
-            assert_true(window instanceof Window);
-            return window;
     }
     assert_unreached();
 }
 function testSet(interface, attribute) {
     test(function() {
         var object = getObject(interface);
         function nop() {}
         assert_equals(object[attribute], null, "Initially null");
         object[attribute] = nop;
         assert_equals(object[attribute], nop, "Return same function");
         object[attribute] = "";
         assert_equals(object[attribute], null, "Return null after setting string");
         object[attribute] = null;
         assert_equals(object[attribute], null, "Finally null");
     }, "Set " + interface + "." + attribute);
 }
 function testReflect(interface, attribute) {
     test(function() {
         var element = getObject(interface);
         assert_false(element.hasAttribute(attribute), "Initially missing");
         element.setAttribute(attribute, "return");
         assert_equals(element.getAttribute(attribute), "return", "Return same string");
         assert_equals(typeof element[attribute], "function", "Convert to function");
         element.removeAttribute(attribute);
     }, "Reflect " + interface + "." + attribute);
 }
-function testForwardToWindow(interface, attribute) {
-    test(function() {
-        var element = getObject(interface);
-        window[attribute] = null;
-        element.setAttribute(attribute, "return");
-        assert_equals(typeof window[attribute], "function", "Convert to function");
-        assert_equals(window[attribute], element[attribute], "Forward content attribute");
-        function nop() {}
-        element[attribute] = nop;
-        assert_equals(window[attribute], nop, "Forward IDL attribute");
-        window[attribute] = null;
-    }, "Forward " + interface + "." + attribute + " to Window");
-}
 // Object.propertyIsEnumerable cannot be used because it doesn't
 // work with properties inherited through the prototype chain.
 function getEnumerable(interface) {
     var enumerable = {};
     for (var attribute in getObject(interface)) {
         enumerable[attribute] = true;
     }
     return enumerable;
 }
+function testEventHandlerMapping(attribute, eventname) {
+    async_test(function(t) {
+        var element = getObject("SVGAnimateElement");
+        assert_false(element.hasAttribute(attribute), "Initially missing");
+        element[attribute] = function() {
+            t.step(function (){assert_true(true); t.done();});
+        };
+        var event = new CustomEvent(eventname);
+        element.dispatchEvent(event);
+    }, "Event " + eventname + " maps to " + attribute);
+}
 var enumerableCache = {};
 function testEnumerate(interface, attribute) {
     if (!(interface in enumerableCache)) {
         enumerableCache[interface] = getEnumerable(interface);
     }
     test(function() {
         assert_true(enumerableCache[interface][attribute]);
     }, "Enumerate " + interface + "." + attribute);
 }