Send a message through the ozone channel to recreate buffers

ui/aura/window_tree_host_ozone.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/aura/window_tree_host_ozone.h"
 
 #include "base/trace_event/trace_event.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/ozone/public/ozone_platform.h"
 #include "ui/platform_window/platform_window.h"
@@ skipping 54 matching lines @@
   platform_window_->SetCursor(cursor.platform());
 }
 
 void WindowTreeHostOzone::MoveCursorToNative(const gfx::Point& location) {
   platform_window_->MoveCursorTo(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());
   OnHostMoved(new_bounds.origin());
 }
 
 void WindowTreeHostOzone::OnDamageRect(const gfx::Rect& damaged_region) {
 }
 
 void WindowTreeHostOzone::DispatchEvent(ui::Event* event) {
@@ skipping 33 matching lines @@
   return new WindowTreeHostOzone(bounds);
 }
 
 // static
 gfx::Size WindowTreeHost::GetNativeScreenSize() {
   NOTIMPLEMENTED();
   return gfx::Size();
 }
 
 }  // namespace aura