partially implement instance of checks and some codegen fixes

test/browser/index.html

Index: test/browser/index.html
diff --git a/test/browser/index.html b/test/browser/index.html
index 234b47e3c1807820f8021cf60493153e305b646c..cc43530933b28559fd461bbf0ec0f06dde98115f 100644
--- a/test/browser/index.html
+++ b/test/browser/index.html
@@ -13,7 +13,12 @@
 <script src="../js_test_tools/mocha-htmltest.js"></script>
 
 <!-- Runtime code to test -->
+<script src="../../lib/runtime/harmony_feature_check.js"></script>
 <script src="../../lib/runtime/dart_runtime.js"></script>
+<script src="../../lib/runtime/dart/core.js"></script>
+<script src="../../lib/runtime/dart/collection.js"></script>
+<script src="../../lib/runtime/dart/_internal.js"></script>
+<script src="../../lib/runtime/dart/math.js"></script>
 
 <!-- tests -->
 <div id="mocha"></div>