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

test/codegen/lib/html/deferred_multi_app_lib.dart

Index: test/codegen/lib/html/deferred_multi_app_lib.dart
diff --git a/test/codegen/language/deferred_type_dependency_lib3.dart b/test/codegen/lib/html/deferred_multi_app_lib.dart
similarity index 81%
copy from test/codegen/language/deferred_type_dependency_lib3.dart
copy to test/codegen/lib/html/deferred_multi_app_lib.dart
index 9a23fc960f3a41a78bc94be3ec5b94d01b130256..6ec352d4a43cf336d85abaf9ebc816150ef0d007 100644
--- a/test/codegen/language/deferred_type_dependency_lib3.dart
+++ b/test/codegen/lib/html/deferred_multi_app_lib.dart
@@ -2,9 +2,10 @@
 // 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.
 
-library lib3;
-
-class A {
-  var p = true;
+one() {
+  return "one";
 }
 
+two() {
+  return "two";
+}