aura: Remove WindowTreeHost::PostNativeEvent().

ui/aura/test/x11_event_sender.h

Index: ui/aura/test/x11_event_sender.h
diff --git a/ui/aura/test/aura_test_utils.h b/ui/aura/test/x11_event_sender.h
similarity index 50%
copy from ui/aura/test/aura_test_utils.h
copy to ui/aura/test/x11_event_sender.h
index ec94b3c3dbc6ca6931085eb4e249da1cdcd1327b..64720acc58284d52e1580b78faa59f76f3fe6e02 100644
--- a/ui/aura/test/aura_test_utils.h
+++ b/ui/aura/test/x11_event_sender.h
@@ -2,23 +2,22 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef UI_AURA_TEST_AURA_TEST_UTILS_H_
-#define UI_AURA_TEST_AURA_TEST_UTILS_H_
+#ifndef UI_AURA_TEST_X11_EVENT_SENDER_H_
+#define UI_AURA_TEST_X11_EVENT_SENDER_H_
 
-#include "base/macros.h"
+#include "ui/gfx/x/x11_types.h"
 
-namespace gfx {
-class Point;
-}
+using XEvent = union _XEvent;
 
 namespace aura {
+
 class WindowTreeHost;
 
 namespace test {
 
-const gfx::Point& QueryLatestMousePositionRequestInHost(WindowTreeHost* host);
+void PostEventToWindowTreeHost(const XEvent& xevent, WindowTreeHost* host);
 
 }  // namespace test
 }  // namespace aura
 
-#endif  // UI_AURA_TEST_AURA_TEST_UTILS_H_
+#endif  // UI_AURA_TEST_X11_EVENT_SENDER_H_