aura: Make sure the root-window retains the X events it was already listening for.

ui/aura/root_window_host_linux.h

Index: ui/aura/root_window_host_linux.h
diff --git a/ui/aura/root_window_host_linux.h b/ui/aura/root_window_host_linux.h
index 18e88c0676a8c997f9798392934b1d070158506a..4aeafb96708f8d404ff375f040d8a942d3efccb1 100644
--- a/ui/aura/root_window_host_linux.h
+++ b/ui/aura/root_window_host_linux.h
@@ -33,6 +33,8 @@ class RootWindowHostLinux : public RootWindowHost,
   virtual bool Dispatch(const base::NativeEvent& event) OVERRIDE;
 
  private:
+  bool DispatchEventForRootWindow(const base::NativeEvent& event);
+
   // RootWindowHost Overrides.
   virtual RootWindow* GetRootWindow() OVERRIDE;
   virtual gfx::AcceleratedWidget GetAcceleratedWidget() OVERRIDE;