Revert "Enhance dart:js interop in a backwards compatible manner."

tools/dom/templates/html/dartium/html_dartium.darttemplate

Index: tools/dom/templates/html/dartium/html_dartium.darttemplate
diff --git a/tools/dom/templates/html/dartium/html_dartium.darttemplate b/tools/dom/templates/html/dartium/html_dartium.darttemplate
index 1d558264eec22d5235140d488454a4554a5fd59c..09347215192026dff1739071b21635463d1560a1 100644
--- a/tools/dom/templates/html/dartium/html_dartium.darttemplate
+++ b/tools/dom/templates/html/dartium/html_dartium.darttemplate
@@ -146,9 +146,9 @@ final htmlBlinkMap = {
   '_DOMWindowCrossFrame': () => _DOMWindowCrossFrame,
   // FIXME: Move these to better locations.
   'DateTime': () => DateTime,
-  'JsObject': () => js.JsObjectImpl,
-  'JsFunction': () => js.JsFunctionImpl,
-  'JsArray': () => js.JsArrayImpl,
+  'JsObject': () => js.JsObject,
+  'JsFunction': () => js.JsFunction,
+  'JsArray': () => js.JsArray,
 $!TYPE_MAP
 };