ozone: Protect X11-specific code under ash/wm

ash/wm/system_gesture_event_filter.cc

Index: ash/wm/system_gesture_event_filter.cc
diff --git a/ash/wm/system_gesture_event_filter.cc b/ash/wm/system_gesture_event_filter.cc
index 1c318327a8ed85d384d1e8435cbaf28b291ba759..e9b45949cb0e47b85ed24c665381dbac7113f16e 100644
--- a/ash/wm/system_gesture_event_filter.cc
+++ b/ash/wm/system_gesture_event_filter.cc
@@ -14,7 +14,7 @@
 #include "ui/events/event.h"
 #include "ui/events/event_constants.h"
 
-#if defined(OS_CHROMEOS)
+#if defined(OS_CHROMEOS) && defined(USE_X11)
 #include "ui/events/x/touch_factory_x11.h"
 #endif
 
@@ -31,7 +31,7 @@ SystemGestureEventFilter::~SystemGestureEventFilter() {
 }
 
 void SystemGestureEventFilter::OnMouseEvent(ui::MouseEvent* event) {
-#if defined(OS_CHROMEOS) && !defined(USE_OZONE)
+#if defined(OS_CHROMEOS) && defined(USE_X11)
   if (event->type() == ui::ET_MOUSE_PRESSED && event->native_event() &&
       ui::TouchFactory::GetInstance()->IsTouchDevicePresent() &&
       Shell::GetInstance()->delegate()) {