Mac fullscreen low power: Ignore WasOccluded by low power window

ui/accelerated_widget_mac/accelerated_widget_mac.mm

Index: ui/accelerated_widget_mac/accelerated_widget_mac.mm
diff --git a/ui/accelerated_widget_mac/accelerated_widget_mac.mm b/ui/accelerated_widget_mac/accelerated_widget_mac.mm
index bc496e1587a24c4e7b681cadb8c3de60664bdd69..92d4c451d14ca73f935d697b8f7deb2c1da69458 100644
--- a/ui/accelerated_widget_mac/accelerated_widget_mac.mm
+++ b/ui/accelerated_widget_mac/accelerated_widget_mac.mm
@@ -124,6 +124,10 @@ - (void)setContentsChanged;
   return fullscreen_low_power_layer_;
 }
 
+bool AcceleratedWidgetMac::MightBeInFullscreenLowPowerMode() const {
+  return fslp_coordinator_;
+}
+
 bool AcceleratedWidgetMac::HasFrameOfSize(
     const gfx::Size& dip_size) const {
   return last_swap_size_dip_ == dip_size;