Merge the Sky Engine changes from the SkyDart branch

sky/tests/lowlevel/filters-expected.sky

Index: sky/tests/lowlevel/filters-expected.sky
diff --git a/sky/tests/lowlevel/filters-expected.sky b/sky/tests/lowlevel/filters-expected.sky
index a73b6fa41d30f4ca0f05f902b4454dfe2c9a5ee9..34757d00717860359561aa2e3c92d11d9623128f 100644
--- a/sky/tests/lowlevel/filters-expected.sky
+++ b/sky/tests/lowlevel/filters-expected.sky
@@ -1,13 +1,18 @@
 <foo>
-<import src="../resources/run-after-display.sky" as="runAfterDisplay" />
+<import src="../resources/run-after-display.sky" />
 
 <img src="http://storage.googleapis.com/mojo/sky-pngs/9a7b59f74e2bbcd0d0ceee17ead05b0da64a2af7" />
 
 <script>
-window.addEventListener('load', function() {
-  runAfterDisplay(function() {
-    internals.notifyTestComplete("");
+import "dart:sky";
+import "dart:sky.internals" as internals;
+
+void main() {
+  window.addEventListener('load', (_) {
+    runAfterDisplay(() {
+      internals.notifyTestComplete("");
+    });
   });
-});
+}
 </script>
 </foo>