Make createWindow (mostly) work with OOPIF

Source/core/frame/Frame.h

Index: Source/core/frame/Frame.h
diff --git a/Source/core/frame/Frame.h b/Source/core/frame/Frame.h
index 66044496b7c440e950f7c1fdc5d0938f12d86dd6..0e5eca777211cc0612895436ca24891d5dd57629 100644
--- a/Source/core/frame/Frame.h
+++ b/Source/core/frame/Frame.h
@@ -50,6 +50,7 @@ class KURL;
 class Page;
 class SecurityContext;
 class Settings;
+class Widget;
 class WindowProxy;
 class WindowProxyManager;
 
@@ -64,6 +65,7 @@ public:
 
     virtual DOMWindow* domWindow() const = 0;
     virtual WindowProxy* windowProxy(DOMWrapperWorld&) = 0;
+    virtual Widget* widget() const = 0;
 
     virtual void navigate(Document& originDocument, const KURL&, bool lockBackForwardList) = 0;
     virtual void reload(ReloadPolicy, ClientRedirectPolicy) = 0;