Add point to Window class and Window polyfills of screen.

sdk/lib/html/dartium/html_dartium.dart

Index: sdk/lib/html/dartium/html_dartium.dart
diff --git a/sdk/lib/html/dartium/html_dartium.dart b/sdk/lib/html/dartium/html_dartium.dart
index fbe12b7ebf314a721ad55c8fcbc70f4d5087a426..f0a0a9a43907a357a762bc27bf4b2ad9a2e05f35 100644
--- a/sdk/lib/html/dartium/html_dartium.dart
+++ b/sdk/lib/html/dartium/html_dartium.dart
@@ -25314,19 +25314,19 @@ class Window extends EventTarget implements WindowBase {
 
   @DomName('Window.screenLeft')
   @DocsEditable()
-  int get screenLeft native "DOMWindow_screenLeft_Getter";
+  int get $dom_screenLeft native "DOMWindow_screenLeft_Getter";
 
   @DomName('Window.screenTop')
   @DocsEditable()
-  int get screenTop native "DOMWindow_screenTop_Getter";
+  int get $dom_screenTop native "DOMWindow_screenTop_Getter";
 
   @DomName('Window.screenX')
   @DocsEditable()
-  int get screenX native "DOMWindow_screenX_Getter";
+  int get $dom_screenX native "DOMWindow_screenX_Getter";
 
   @DomName('Window.screenY')
   @DocsEditable()
-  int get screenY native "DOMWindow_screenY_Getter";
+  int get $dom_screenY native "DOMWindow_screenY_Getter";
 
   @DomName('Window.scrollX')
   @DocsEditable()
@@ -25484,7 +25484,7 @@ class Window extends EventTarget implements WindowBase {
 
   @DomName('Window.moveTo')
   @DocsEditable()
-  void moveTo(num x, num y) native "DOMWindow_moveTo_Callback";
+  void $dom_moveTo(num x, num y) native "DOMWindow_moveTo_Callback";
 
   @DomName('Window.open')
   @DocsEditable()
@@ -25839,6 +25839,10 @@ class Window extends EventTarget implements WindowBase {
   @DomName('DOMWindow.onbeforeunload')
   @DocsEditable()
   Stream<Event> get onBeforeUnload => beforeUnloadEvent.forTarget(this);
+
+  void moveTo(Point p) => $dom_moveTo(p.x, p.y);
+  int get screenX() => Device.isIE ? $dom_screenLeft : $dom_screenX;
+  int get screenY() => Device.isIE ? $dom_screenTop : $dom_screenY;
 }
 
 /**