X11: Remove calls to XSelectInput

ui/aura/window_tree_host_x11.h

Index: ui/aura/window_tree_host_x11.h
diff --git a/ui/aura/window_tree_host_x11.h b/ui/aura/window_tree_host_x11.h
index f209e10bdba49a8d8800cd4f028d60a4871707ad..8ae70d5614ffe90e04f12d0e4a5428deab18d3da 100644
--- a/ui/aura/window_tree_host_x11.h
+++ b/ui/aura/window_tree_host_x11.h
@@ -24,6 +24,7 @@ typedef XID Window;
 
 namespace ui {
 class MouseEvent;
+class XScopedEventSelector;
 }
 
 namespace aura {
@@ -52,6 +53,9 @@ class AURA_EXPORT WindowTreeHostX11 : public WindowTreeHost,
   void MoveCursorToNative(const gfx::Point& location) override;
   void OnCursorVisibilityChangedNative(bool show) override;
 
+  // Deselects mouse and keyboard events on |xwindow_|.
+  void DisableInput();
+
  protected:
   // Called when X Configure Notify event is recevied.
   virtual void OnConfigureNotify();
@@ -79,6 +83,9 @@ class AURA_EXPORT WindowTreeHostX11 : public WindowTreeHost,
   XDisplay* xdisplay_;
   ::Window xwindow_;
 
+  // Events selected on |xwindow_|.
+  std::unique_ptr<ui::XScopedEventSelector> xwindow_events_;
+
   // The native root window.
   ::Window x_root_window_;