Add more tests for mouse rotation,scale&position after display change

ash/display/cursor_window_controller.h

Index: ash/display/cursor_window_controller.h
diff --git a/ash/display/cursor_window_controller.h b/ash/display/cursor_window_controller.h
index 8af6906eec96d2e3a785b244ed35c4b42fc9ef95..8ce1a5b98f64254e5e7e4354ab8827ec6d64b351 100644
--- a/ash/display/cursor_window_controller.h
+++ b/ash/display/cursor_window_controller.h
@@ -15,6 +15,7 @@ namespace test {
 class MirrorWindowTestApi;
 }
 
+class CursorWindowControllerTest;
 class CursorWindowDelegate;
 
 // Draws a mouse cursor on a given container window.
@@ -48,6 +49,7 @@ class ASH_EXPORT CursorWindowController {
   void SetVisibility(bool visible);
 
  private:
+  friend class CursorWindowControllerTest;
   friend class test::MirrorWindowTestApi;
 
   // Sets the container window for the cursor window controller.
@@ -76,7 +78,6 @@ class ASH_EXPORT CursorWindowController {
   bool visible_;
 
   ui::CursorSetType cursor_set_;
-  gfx::Display::Rotation cursor_rotation_;
   gfx::Point hot_point_;
 
   // The display on which the cursor is drawn.