Do not use overlays when VR shell is enabled.

content/renderer/render_widget.cc

Index: content/renderer/render_widget.cc
diff --git a/content/renderer/render_widget.cc b/content/renderer/render_widget.cc
index bad734174607b0d80a9a349333307adfaea34849..4aae41da8a917f8d06406579ad7aa956e0ced11a 100644
--- a/content/renderer/render_widget.cc
+++ b/content/renderer/render_widget.cc
@@ -1035,7 +1035,9 @@ void RenderWidget::Resize(const ResizeParams& params) {
       screen_info_.orientation_angle != params.screen_info.orientation_angle ||
       screen_info_.orientation_type != params.screen_info.orientation_type;
 
+  LOG(ERROR) << "===amp=== resize render widget, current in vr = " << screen_info_.in_vr;
   screen_info_ = params.screen_info;
+  LOG(ERROR) << "===amp=== resize render widget, passed in vr = " << screen_info_.in_vr;
 
   if (device_scale_factor_ != screen_info_.device_scale_factor) {
     device_scale_factor_ = screen_info_.device_scale_factor;