[SVG] Handle animation freeze when 'repeatDur' is not a multiple of 'dur'

LayoutTests/svg/animations/script-tests/animate-fill-freeze-with-repeatDur.js

+description("Test for animation freeze when repeatDur is not a multiple of dur");
+embedSVGTestCase("resources/animate-fill-freeze-with-repeatDur.svg");
+
+// Setup animation test
+function sample1() {
+    shouldBeCloseEnough("rect1.x.animVal.value", "0");
+    shouldBe("rect1.x.baseVal.value", "0");
+}
+
+function sample2() {
+    shouldBeCloseEnough("rect1.x.animVal.value", "150");
+    shouldBe("rect1.x.baseVal.value", "0");
+}
+
+function executeTest() {
+    var rects = rootSVGElement.ownerDocument.getElementsByTagName("rect");
+    rect1 = rects[0];
+
+    const expectedValues = [
+        // [animationId, time, sampleCallback]
+        ["anim", 0.0,   sample1],
+        ["anim", 6.0,   sample2]
+    ];
+
+    runAnimationTest(expectedValues);
+}
+
+window.animationStartsImmediately = true;
+var successfullyParsed = true;