Fixing some SVG collections not working on Dartium

tests/html/svgelement_test.dart

Index: tests/html/svgelement_test.dart
diff --git a/tests/html/svgelement_test.dart b/tests/html/svgelement_test.dart
index 6bc60b03787d39f145677d5b5f54c8e88048ddaa..f94baaef7c09c1e2fcc2e9fdcb0306a3e43ec0d9 100644
--- a/tests/html/svgelement_test.dart
+++ b/tests/html/svgelement_test.dart
@@ -439,4 +439,14 @@ main() {
       expect(rect.height, closeTo(100, 1));
     });
   });
+
+  group('PathElement', () {
+    test('pathSegList', () {
+      svg.PathElement path =
+          new svg.SvgElement.svg('<path d="M 100 100 L 300 100 L 200 300 z"/>');
+      for (var seg in path.pathSegList) {
+        expect(seg is svg.PathSeg, isTrue);
+      }
+    });
+  });
 }