[SVG] SVGAnimatedPointList migration to new SVG property impl.

LayoutTests/svg/custom/script-tests/immutable-properties.js

Index: LayoutTests/svg/custom/script-tests/immutable-properties.js
diff --git a/LayoutTests/svg/custom/script-tests/immutable-properties.js b/LayoutTests/svg/custom/script-tests/immutable-properties.js
index 0182bd6a372339f0c458b669a68d42bdc3d00a54..d0c14ac55bf645b21bf639b53fe224583380654c 100644
--- a/LayoutTests/svg/custom/script-tests/immutable-properties.js
+++ b/LayoutTests/svg/custom/script-tests/immutable-properties.js
@@ -29,23 +29,20 @@ shouldBe("zoomEvent.previousScale", "0")
 var previousTranslate = zoomEvent.previousTranslate;
 
 shouldBe("previousTranslate.x", "0");
-previousTranslate.x = 300;
+shouldThrow("previousTranslate.x = 300;");
 
-shouldBe("previousTranslate.x", "300");
 shouldBe("zoomEvent.previousTranslate.x", "0");
 
 // 'newScale' property
 shouldBe("zoomEvent.newScale", "0");
-zoomEvent.newScale = 200;
+shouldThrow("zoomEvent.newScale = 200;");
 shouldBe("zoomEvent.newScale", "0");
 
 // 'newTranslate' property
-var newTranslate = zoomEvent.previousTranslate;
+var newTranslate = zoomEvent.newTranslate;
 
 shouldBe("newTranslate.x", "0");
-newTranslate.x = 300;
-
-shouldBe("newTranslate.x", "300");
-shouldBe("zoomEvent.newTranslate.x", "0");
+shouldThrow("newTranslate.x = 300;");
+shouldBe("newTranslate.x", "0");
 
 var successfullyParsed = true;