[SVG] Regression: SVG syncbase animation no longer supports cyclic references

LayoutTests/svg/animations/script-tests/cyclic-syncbase.js

+description("Test cyclic for svg animations for syncbases");
+embedSVGTestCase("resources/cyclic-syncbase.svg");
+
+// Setup animation test
+function sample1() {
+    shouldBeCloseEnough("rootSVGElement.getBBox().x", "100");
+    shouldBeCloseEnough("rootSVGElement.getBBox().y", "0");
+}
+
+function sample2() {
+    shouldBeCloseEnough("rootSVGElement.getBBox().x", "0");
+    shouldBeCloseEnough("rootSVGElement.getBBox().y", "100");
+}
+
+function executeTest() {
+
+    const expectedValues = [
+        // [animationId, time, sampleCallback]
+        ["anim", 0.01,   sample1],
+        ["anim", 1.01,   sample2],
+        ["anim", 2.01,   sample1],
+        ["anim", 3.01,   sample2],
+        ["anim", 4.01,   sample1]
+    ];
+
+    runAnimationTest(expectedValues);
+}
+
+window.animationStartsImmediately = true;
+var successfullyParsed = true;
+