Screen Orientation: fire event on Window instead of Screen.

Source/modules/screen_orientation/ScreenOrientation.h

Index: Source/modules/screen_orientation/ScreenOrientation.h
diff --git a/Source/modules/screen_orientation/ScreenOrientation.h b/Source/modules/screen_orientation/ScreenOrientation.h
index 7a3e05a9ae61e2c16e8e6abaecfb78e40ab6f8aa..99e1db393ae29adb0fdc7341e9da1504838d5512 100644
--- a/Source/modules/screen_orientation/ScreenOrientation.h
+++ b/Source/modules/screen_orientation/ScreenOrientation.h
@@ -5,7 +5,6 @@
 #ifndef ScreenOrientation_h
 #define ScreenOrientation_h
 
-#include "core/events/EventTarget.h"
 #include "core/frame/DOMWindowProperty.h"
 #include "heap/Handle.h"
 #include "platform/Supplementable.h"
@@ -25,8 +24,6 @@ public:
     static ScreenOrientation& from(Screen&);
     virtual ~ScreenOrientation();
 
-    DEFINE_STATIC_ATTRIBUTE_EVENT_LISTENER(orientationchange);
-
     static const AtomicString& orientation(Screen&);
     static bool lockOrientation(Screen&, const AtomicString& orientation);
     static void unlockOrientation(Screen&);