bindings: Window must be LocalDOMWindow by definition.

Source/core/frame/LocalDOMWindow.h

Index: Source/core/frame/LocalDOMWindow.h
diff --git a/Source/core/frame/LocalDOMWindow.h b/Source/core/frame/LocalDOMWindow.h
index d1f179ac792adbeb02118fa885ecb59b1460558d..9dd259f8d6c66cc4bcd38c1d5aaeecd4a4fa2878 100644
--- a/Source/core/frame/LocalDOMWindow.h
+++ b/Source/core/frame/LocalDOMWindow.h
@@ -124,10 +124,12 @@ public:
     void setStatus(const String&) override;
     String defaultStatus() const override;
     void setDefaultStatus(const String&) override;
-    DOMWindow* self() const override;
-    DOMWindow* opener() const override;
-    DOMWindow* parent() const override;
-    DOMWindow* top() const override;
+    LocalDOMWindow* self() const override;
+    LocalDOMWindow* window() const { return self(); }
+    LocalDOMWindow* frames() const { return self(); }
+    LocalDOMWindow* opener() const override;
+    LocalDOMWindow* parent() const override;
+    LocalDOMWindow* top() const override;
     Document* document() const override;
     StyleMedia* styleMedia() const override;
     double devicePixelRatio() const override;