Don't destroy RenderWidgetCompositor during DoDeferredClose

content/renderer/gpu/render_widget_compositor.cc

Index: content/renderer/gpu/render_widget_compositor.cc
diff --git a/content/renderer/gpu/render_widget_compositor.cc b/content/renderer/gpu/render_widget_compositor.cc
index b9d7a019b13368dd617cd0a4601e0cf6c75e6aef..2d8444de9c79827484341065cfb85c0fe35099b5 100644
--- a/content/renderer/gpu/render_widget_compositor.cc
+++ b/content/renderer/gpu/render_widget_compositor.cc
@@ -507,6 +507,10 @@ bool RenderWidgetCompositor::SendMessageToMicroBenchmark(
   return layer_tree_host_->SendMessageToMicroBenchmark(id, value.Pass());
 }
 
+void RenderWidgetCompositor::Shutdown() {
+  layer_tree_host_->SetLayerTreeHostClientFinished();
+}
+
 void RenderWidgetCompositor::Initialize(cc::LayerTreeSettings settings) {
   scoped_refptr<base::MessageLoopProxy> compositor_message_loop_proxy;
   RenderThreadImpl* render_thread = RenderThreadImpl::current();