SVG: Moving animating <svg> to other iframe should not crash.

LayoutTests/svg/dom/move-animating-svg-to-other-frame.html

Index: LayoutTests/svg/dom/move-animating-svg-to-other-frame.html
diff --git a/LayoutTests/svg/dom/move-animating-svg-to-other-frame.html b/LayoutTests/svg/dom/move-animating-svg-to-other-frame.html
new file mode 100644
index 0000000000000000000000000000000000000000..966d8bb029beb5c78cab4b5be61286addafa7150
--- /dev/null
+++ b/LayoutTests/svg/dom/move-animating-svg-to-other-frame.html
@@ -0,0 +1,21 @@
+<script src="../../resources/js-test.js"></script>
+<script>
+jsTestIsAsync = true;
+description("Moving animating svg document to other iframe should not crash.");
+
+var otherSVG = null; // read from resources/import-other-svg.svg
+function loadedSVGToBeMoved()
+{
+    debug("loaded SVG to be moved");
+
+    var source = document.getElementById("source");
+    otherSVG = source.contentDocument.documentElement;
+
+    var target = document.getElementById("target");
+    target.src = "resources/import-other-svg.svg";
+    target.onload = finishJSTest;
+}
+</script>
+<iframe id="source" src="resources/svg-with-animate.svg" onload="loadedSVGToBeMoved()"></iframe>
+<iframe id="target"></iframe>
+<p>Test pass if no crash.</p>