Add point to Window class and Window polyfills of screen.

sdk/lib/html/dart2js/html_dart2js.dart

Index: sdk/lib/html/dart2js/html_dart2js.dart
diff --git a/sdk/lib/html/dart2js/html_dart2js.dart b/sdk/lib/html/dart2js/html_dart2js.dart
index 5f54dcc4b2fd96cc0decd7ae404558a5b713f686..47f469b61868916023b421e7dac98f2090ac15ae 100644
--- a/sdk/lib/html/dart2js/html_dart2js.dart
+++ b/sdk/lib/html/dart2js/html_dart2js.dart
@@ -24165,9 +24165,10 @@ class Window extends EventTarget implements WindowBase native "Window,DOMWindow"
   @DocsEditable()
   void moveBy(num x, num y) native;
 
+  @JSName('moveTo')
   @DomName('Window.moveTo')
   @DocsEditable()
-  void moveTo(num x, num y) native;
+  void $dom_moveTo(num x, num y) native;
 
   @DomName('Window.openDatabase')
   @DocsEditable()
@@ -24552,6 +24553,10 @@ class Window extends EventTarget implements WindowBase native "Window,DOMWindow"
   @DomName('DOMWindow.onbeforeunload')
   @DocsEditable()
   Stream<Event> get onBeforeUnload => beforeUnloadEvent.forTarget(this);
+
+  void moveTo(Point p) {
+    $dom_moveTo(p.x, p.y);
+  }
 }
 
 /**