ozone: Move InputControllerTest to a common place

ui/ozone/public/input_controller.h

Index: ui/ozone/public/input_controller.h
diff --git a/ui/ozone/public/input_controller.h b/ui/ozone/public/input_controller.h
index df5fd3bc914f265a425ec7c6ae3d9158570e40b3..ee33560fc57d08a664c53a858795d9432d91750b 100644
--- a/ui/ozone/public/input_controller.h
+++ b/ui/ozone/public/input_controller.h
@@ -6,6 +6,7 @@
 #define UI_OZONE_PUBLIC_INPUT_CONTROLLER_H_
 
 #include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
 #include "ui/ozone/ozone_export.h"
 
 namespace ui {
@@ -39,6 +40,9 @@ class OZONE_EXPORT InputController {
   DISALLOW_COPY_AND_ASSIGN(InputController);
 };
 
+// Create an input controller that does nothing.
+OZONE_EXPORT scoped_ptr<InputController> CreateStubInputController();
+
 }  // namespace ui
 
 #endif  // UI_OZONE_PUBLIC_INPUT_CONTROLLER_H_