[ScreenOrientation] Add use counters.

Source/modules/screen_orientation/ScreenScreenOrientation.idl

Index: Source/modules/screen_orientation/ScreenScreenOrientation.idl
diff --git a/Source/modules/screen_orientation/ScreenScreenOrientation.idl b/Source/modules/screen_orientation/ScreenScreenOrientation.idl
index 2905343b8eb2fe3ae71e86e6da27057d495929a7..cf81539a4621ea5a06d5e00b02e951773f52eaa5 100644
--- a/Source/modules/screen_orientation/ScreenScreenOrientation.idl
+++ b/Source/modules/screen_orientation/ScreenScreenOrientation.idl
@@ -5,5 +5,5 @@
 [
     RuntimeEnabled=ScreenOrientation
 ] partial interface Screen {
-    [CallWith=ScriptState] readonly attribute ScreenOrientation orientation;
+    [CallWith=ScriptState, MeasureAs=ScreenOrientation] readonly attribute ScreenOrientation orientation;

[Peter Beverloo, 2014/10/02 13:29:34]

Since you measure all properties within the ScreenOrientation individually,
what's the benefit of measuring access to the screen.orientation getter itself?

You should probably drop this one.

 };