aura: Support SurfaceDestroyed() on Android

ui/aura/window_tree_host_platform.cc

 // Copyright 2015 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_platform.h"
 
 #include "base/trace_event/trace_event.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/compositor/compositor.h"
 #include "ui/events/event.h"
@@ skipping 150 matching lines @@
 }
 
 void WindowTreeHostPlatform::OnAcceleratedWidgetAvailable(
     gfx::AcceleratedWidget widget,
     float device_pixel_ratio) {
   widget_ = widget;
   CreateCompositor();
   WindowTreeHost::OnAcceleratedWidgetAvailable();
 }
 
+void WindowTreeHostPlatform::OnAcceleratedWidgetDestroyed() {
+  gfx::AcceleratedWidget widget = compositor()->ReleaseAcceleratedWidget();
+  DCHECK_EQ(widget, widget_);
+  widget_ = gfx::kNullAcceleratedWidget;
+}
+
 void WindowTreeHostPlatform::OnActivationChanged(bool active) {
   if (active)
     OnHostActivated();
 }
 
 }  // namespace aura