MacViews: Initial skeleton for implementing NativeWidgetMac

ui/views/widget/native_widget_mac.h

Index: ui/views/widget/native_widget_mac.h
diff --git a/ui/views/widget/native_widget_mac.h b/ui/views/widget/native_widget_mac.h
index a4e18940697e58c090177d71f68bccadf21704cd..97c7de7a6bed3d79abacdb10e7bdf91c13634d4a 100644
--- a/ui/views/widget/native_widget_mac.h
+++ b/ui/views/widget/native_widget_mac.h
@@ -5,12 +5,13 @@
 #ifndef UI_VIEWS_WIDGET_NATIVE_WIDGET_MAC_H_
 #define UI_VIEWS_WIDGET_NATIVE_WIDGET_MAC_H_
 
-#include "base/mac/scoped_nsobject.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/views/widget/native_widget_private.h"
 
 namespace views {
 
+class BridgedNativeWidget;
+
 class VIEWS_EXPORT NativeWidgetMac : public internal::NativeWidgetPrivate {
  public:
   NativeWidgetMac(internal::NativeWidgetDelegate* delegate);
@@ -105,7 +106,7 @@ class VIEWS_EXPORT NativeWidgetMac : public internal::NativeWidgetPrivate {
 
  private:
   internal::NativeWidgetDelegate* delegate_;
-  base::scoped_nsobject<NSWindow> window_;
+  scoped_ptr<BridgedNativeWidget> bridge_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeWidgetMac);
 };