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 f51cc4eb9d062a5ab7db03542ca603c02a65d88d..2d46dbe107422bb669fc394430ff54f22ccbcd16 100644
--- a/ash/display/cursor_window_controller.h
+++ b/ash/display/cursor_window_controller.h
@@ -14,6 +14,7 @@ namespace test {
 class MirrorWindowTestApi;
 }
 
+class CursorWindowControllerTest;
 class CursorWindowDelegate;
 
 // Draws a mouse cursor on a given container window.
@@ -47,6 +48,7 @@ class CursorWindowController {
   void SetVisibility(bool visible);
 
  private:
+  friend class CursorWindowControllerTest;
   friend class test::MirrorWindowTestApi;
 
   // Sets the container window for the cursor window controller.
@@ -69,7 +71,6 @@ class CursorWindowController {
   int cursor_type_;
 
   ui::CursorSetType cursor_set_;
-  gfx::Display::Rotation cursor_rotation_;
   gfx::Point hot_point_;
 
   // The display on which the cursor is drawn.