aura: Remove WindowTreeHost::PostNativeEvent().

ui/aura/window_tree_host_x11.cc

Index: ui/aura/window_tree_host_x11.cc
diff --git a/ui/aura/window_tree_host_x11.cc b/ui/aura/window_tree_host_x11.cc
index 4914b25a95a8d2445f1ff9a64d70f697e21f127c..16096b71809f6833b818fad3d920a411091884b7 100644
--- a/ui/aura/window_tree_host_x11.cc
+++ b/ui/aura/window_tree_host_x11.cc
@@ -572,40 +572,6 @@ void WindowTreeHostX11::ReleaseCapture() {
   // TODO(oshima): Release x input.
 }
 
-void WindowTreeHostX11::PostNativeEvent(
-    const base::NativeEvent& native_event) {
-  DCHECK(xwindow_);
-  DCHECK(xdisplay_);
-  XEvent xevent = *native_event;
-  xevent.xany.display = xdisplay_;
-  xevent.xany.window = xwindow_;
-
-  switch (xevent.type) {
-    case EnterNotify:
-    case LeaveNotify:
-    case MotionNotify:
-    case KeyPress:
-    case KeyRelease:
-    case ButtonPress:
-    case ButtonRelease: {
-      // The fields used below are in the same place for all of events
-      // above. Using xmotion from XEvent's unions to avoid repeating
-      // the code.
-      xevent.xmotion.root = x_root_window_;
-      xevent.xmotion.time = CurrentTime;
-
-      gfx::Point point(xevent.xmotion.x, xevent.xmotion.y);
-      ConvertPointToNativeScreen(&point);
-      xevent.xmotion.x_root = point.x();
-      xevent.xmotion.y_root = point.y();
-    }
-    default:
-      break;
-  }
-  XSendEvent(xdisplay_, xwindow_, False, 0, &xevent);
-  XFlush(xdisplay_);
-}
-
 void WindowTreeHostX11::SetCursorNative(gfx::NativeCursor cursor) {
   if (cursor == current_cursor_)
     return;