Defer late and async scripts

LayoutTests/http/tests/loading/script-priorities-expected.txt

Index: LayoutTests/http/tests/loading/script-priorities-expected.txt
diff --git a/LayoutTests/http/tests/loading/script-priorities-expected.txt b/LayoutTests/http/tests/loading/script-priorities-expected.txt
new file mode 100644
index 0000000000000000000000000000000000000000..9f24e49a03ced33f10d0431fae4e62a65283d330
--- /dev/null
+++ b/LayoutTests/http/tests/loading/script-priorities-expected.txt
@@ -0,0 +1,23 @@
+main frame - didStartProvisionalLoadForFrame
+main frame - didCommitLoadForFrame
+http://127.0.0.1:8000/js-test-resources/js-test.js has priority Medium
+http://127.0.0.1:8000/misc/resources/defer-script.js has priority VeryLow
+http://127.0.0.1:8000/misc/resources/async-script.js has priority VeryLow
+http://127.0.0.1:8000/loading/resources/head.js has priority Medium
+http://127.0.0.1:8000/loading/resources/body.js has priority Low
+http://127.0.0.1:8000/loading/resources/injected.js has priority VeryLow
+http://127.0.0.1:8000/loading/resources/body.js changed priority to Medium, intra_priority 0
+http://127.0.0.1:8000/loading/resources/document-write.js has priority Medium
+main frame - didFinishDocumentLoadForFrame
+main frame - didHandleOnloadEventsForFrame
+main frame - didFinishLoadForFrame
+head
+body
+async
+injected
+document.write
+defer
+PASS successfullyParsed is true
+
+TEST COMPLETE
+