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

karma.conf.js

Index: karma.conf.js
diff --git a/karma.conf.js b/karma.conf.js
index 279e5c1e107fea7109507b9aaf07a38bae0a3236..a3920d0d5f97f2315f66c46e3f71821ea321a84c 100644
--- a/karma.conf.js
+++ b/karma.conf.js
@@ -19,6 +19,7 @@ module.exports = function(config) {
       'test/codegen/expect/async_helper/async_helper.js',
       'test/codegen/expect/dom/dom.js',
       'test/codegen/expect/expect/expect.js',
+      'test/codegen/expect/js/js.js',
       'test/codegen/expect/matcher/matcher.js',
       'test/codegen/expect/unittest/unittest.js',
       'test/codegen/expect/syncstar_syntax.js',
@@ -26,6 +27,7 @@ module.exports = function(config) {
       'test/codegen/expect/language/sub/sub.js',
       'test/codegen/expect/language/*.lib',
       'test/codegen/expect/lib-typed_data/**.js',
+      'test/codegen/expect/lib-html/**.js',
       'test/browser/*.js',
       'test-main.js',
     ],