Revert of Use platform's device scale factor for cursor

ash/test/cursor_manager_test_api.h

Index: ash/test/cursor_manager_test_api.h
diff --git a/ash/test/cursor_manager_test_api.h b/ash/test/cursor_manager_test_api.h
index fce98ca2422277d4a3fffa576850930b14d17ea9..1b9c6b82ce7ee78acd17b2bab1fd69b5c8642af3 100644
--- a/ash/test/cursor_manager_test_api.h
+++ b/ash/test/cursor_manager_test_api.h
@@ -7,8 +7,11 @@
 
 #include "base/basictypes.h"
 #include "ui/base/cursor/cursor.h"
-#include "ui/gfx/display.h"
 #include "ui/gfx/native_widget_types.h"
+
+namespace gfx {
+class Display;
+}
 
 namespace wm {
 class CursorManager;
@@ -25,8 +28,7 @@
 
   ui::CursorSetType GetCurrentCursorSet() const;
   gfx::NativeCursor GetCurrentCursor() const;
-  gfx::Display::Rotation GetCurrentCursorRotation() const;
-  float GetCurrentCursorScale() const;
+  gfx::Display GetDisplay() const;
 
  private:
   ::wm::CursorManager* cursor_manager_;