Send a message through the ozone channel to recreate buffers

ui/aura/window_tree_host_ozone.cc

Index: ui/aura/window_tree_host_ozone.cc
diff --git a/ui/aura/window_tree_host_ozone.cc b/ui/aura/window_tree_host_ozone.cc
index 1559c243e0b03696dd9da653b945d31c6b7ab332..f39b9d6fd53576c7a130bbf44cc63b79372bdb04 100644
--- a/ui/aura/window_tree_host_ozone.cc
+++ b/ui/aura/window_tree_host_ozone.cc
@@ -72,6 +72,10 @@ void WindowTreeHostOzone::MoveCursorToNative(const gfx::Point& location) {
 void WindowTreeHostOzone::OnCursorVisibilityChangedNative(bool show) {
 }
 
+void WindowTreeHostOzone::OnChangedSurface() {
+  // compositor_;
+}
+
 void WindowTreeHostOzone::OnBoundsChanged(const gfx::Rect& new_bounds) {
   // TOOD(spang): Should we determine which parts changed?
   OnHostResized(new_bounds.size());