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 1b9c6b82ce7ee78acd17b2bab1fd69b5c8642af3..fce98ca2422277d4a3fffa576850930b14d17ea9 100644
--- a/ash/test/cursor_manager_test_api.h
+++ b/ash/test/cursor_manager_test_api.h
@@ -7,12 +7,9 @@
 
 #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;
 }
@@ -28,7 +25,8 @@ class CursorManagerTestApi {
 
   ui::CursorSetType GetCurrentCursorSet() const;
   gfx::NativeCursor GetCurrentCursor() const;
-  gfx::Display GetDisplay() const;
+  gfx::Display::Rotation GetCurrentCursorRotation() const;
+  float GetCurrentCursorScale() const;
 
  private:
   ::wm::CursorManager* cursor_manager_;