Stop painting when receiving delegated frame

ui/aura/window.cc

Index: ui/aura/window.cc
diff --git a/ui/aura/window.cc b/ui/aura/window.cc
index 992642ed059430e692535edddb94498b63cf7eed..eb7d1f18619ae56df7551e62141594d2014de2cf 100644
--- a/ui/aura/window.cc
+++ b/ui/aura/window.cc
@@ -491,12 +491,18 @@ void Window::SchedulePaintInRect(const gfx::Rect& rect) {
       parent_rect.Offset(bounds().origin().OffsetFromOrigin());
       parent_->SchedulePaintInRect(parent_rect);
     }
-  } else if (layer() && layer()->SchedulePaint(rect)) {
-    FOR_EACH_OBSERVER(
-        WindowObserver, observers_, OnWindowPaintScheduled(this, rect));
+  } else if (layer()) {
+    layer()->SchedulePaint(rect);
   }
 }
 
+void Window::OnDelegatedFrameDamage(const gfx::Rect& damage_rect_in_dip) {
+  DCHECK(layer());
+  FOR_EACH_OBSERVER(WindowObserver,
+                    observers_,
+                    OnDelegatedFrameDamage(this, damage_rect_in_dip));
+}
+
 void Window::StackChildAtTop(Window* child) {
   if (children_.size() <= 1 || child == children_.back())
     return;  // In the front already.