Restore js interop code

tests/html/html.status

Index: tests/html/html.status
diff --git a/tests/html/html.status b/tests/html/html.status
index 155df79891d58ff0ba9a2d8d64ed92f788963c46..bdcf99579ea048aab2c8f600a5deaacff8f48ec3 100644
--- a/tests/html/html.status
+++ b/tests/html/html.status
@@ -8,21 +8,12 @@ xmldocument_test: Skip  # XML in dart:html is incomplete
 xmlelement_test: Skip  # XML in dart:html is incomplete
 measurement_test: Pass, Fail  # Issue 1940
 
-# Isolate implementation is private after the unification - Issue 4651
-js_interop_3_test: Fail
-js_interop_4_test: Fail
-js_interop_func_passing_test: Fail
-
-[ $compiler == dart2js && ($runtime == chrome || $runtime == ff) ]
-js_interop_2_test: Fail  # Issue 4651
-
 [ $runtime == drt ]
 xhr_cross_origin_test: Skip  # Issue 4502: Passes with --allow-external-pages.
 
 [ $compiler == none && ($runtime == drt || $runtime == dartium) ]
 request_animation_frame_test: Skip   # drt hangs; requestAnimationFrame not implemented
 #htmloptionscollection_test: Fail # TODO(asiva): investigate.
-js_interop_2_test: Fail  # Issue 4651
 
 [ $compiler == none && $runtime == drt && $system == windows]
 audiocontext_test: Skip