Revert "Dartium JS Interop enabled."

tools/dom/src/native_DOMImplementation.dart

Index: tools/dom/src/native_DOMImplementation.dart
diff --git a/tools/dom/src/native_DOMImplementation.dart b/tools/dom/src/native_DOMImplementation.dart
index 9f74d3e1c7471e613522f960fd8c54004f0d37d2..34c032bb7377e674228c7e78276c1cbdbc2f9816 100644
--- a/tools/dom/src/native_DOMImplementation.dart
+++ b/tools/dom/src/native_DOMImplementation.dart
@@ -187,7 +187,9 @@ class _Utils {
     return element;
   }
 
-  static window() => wrap_jso(js.context['window']);
+  // TODO(terry): Enable below for Dartium w/ interop and remove other static window().
+  // static window() => wrap_jso(_blink.Blink_Utils.window()['window']);
+  static window() => _blink.Blink_Utils.window();
 
   static forwardingPrint(String message) => _blink.Blink_Utils.forwardingPrint(message);
   static void spawnDomHelper(Function f, int replyTo) =>
@@ -804,19 +806,15 @@ class _Utils {
   static Element createElement(Document document, String tagName) =>
     wrap_jso(_blink.Blink_Utils.createElement(unwrap_jso(document), tagName));
 
+  static void initializeCustomElement(HtmlElement element) =>
+    _blink.Blink_Utils.initializeCustomElement(unwrap_jso(element));
+
   static Element changeElementWrapper(HtmlElement element, Type type) =>
     _blink.Blink_Utils.changeElementWrapper(unwrap_jso(element), type);
 }
 
 class _DOMWindowCrossFrame extends NativeFieldWrapperClass2 implements
     WindowBase {
-  /** Needed because KeyboardEvent is implements.
-   *  TODO(terry): Consider making blink_jsObject private (add underscore) for
-   *               all blink_jsObject.  Then needed private wrap/unwrap_jso
-   *               functions that delegate to a public wrap/unwrap_jso.
-   */
-  js.JsObject blink_jsObject;
-
   _DOMWindowCrossFrame.internal();
 
   // Fields.
@@ -875,7 +873,7 @@ class _LocationCrossFrame extends NativeFieldWrapperClass2 implements LocationBa
   _LocationCrossFrame.internal();
 
   // Fields.
-  set href(String h) => _blink.Blink_LocationCrossFrame.set_href(this, h);
+  void set href(String h) => _blink.Blink_LocationCrossFrame.set_href(this, h);
 
   // Implementation support.
   String get typeName => "Location";
@@ -1111,6 +1109,10 @@ get _pureIsolateScheduleImmediateClosure => ((void callback()) =>
   throw new UnimplementedError("scheduleMicrotask in background isolates "
                                "are not supported in the browser"));
 
+void _initializeCustomElement(Element e) {
+  _Utils.initializeCustomElement(e);
+}
+
 // Class for unsupported native browser 'DOM' objects.
 class _UnsupportedBrowserObject extends NativeFieldWrapperClass2 {
 }