Add all dart:html tests from the sdk to test/codegen.

test/codegen/lib/html/two_scripts_test_second.dart

Index: test/codegen/lib/html/two_scripts_test_second.dart
diff --git a/test/codegen/language/metadata_self_test.dart b/test/codegen/lib/html/two_scripts_test_second.dart
similarity index 56%
copy from test/codegen/language/metadata_self_test.dart
copy to test/codegen/lib/html/two_scripts_test_second.dart
index 434cc38a0a0c2cc3aa81953b34b4cbdb7cd8abee..eab4493e38e67365dbfede4f9df5de3e846f00d0 100644
--- a/test/codegen/language/metadata_self_test.dart
+++ b/test/codegen/lib/html/two_scripts_test_second.dart
@@ -2,13 +2,14 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-// Test that metadata refer to the annotated declaration.
+library TwoScriptsTestSecond;
+import 'dart:html';
 
-@Foo()
-class Foo {
-  const Foo();
+aGlobalFunction() {
+  window.postMessage('second_global', '*');
 }
 
 main() {
-  Foo f = const Foo();
+  window.postMessage('second_local', '*');
+  aGlobalFunction();
 }