Non-composited scrolling div should invalidate when it has descendant paints to its backing

Source/core/rendering/RenderLayer.cpp

Index: Source/core/rendering/RenderLayer.cpp
diff --git a/Source/core/rendering/RenderLayer.cpp b/Source/core/rendering/RenderLayer.cpp
index 933e0ea3c32a8229422ed41898fac51bbcb7278e..6107a969b2a1d8e2d96c8e8b12e3bcda16bf2e20 100644
--- a/Source/core/rendering/RenderLayer.cpp
+++ b/Source/core/rendering/RenderLayer.cpp
@@ -642,7 +642,7 @@ void RenderLayer::updateScrollingStateAfterCompositingChange()
 
     m_hasNonCompositedChild = false;
     for (RenderLayer* child = firstChild(); child; child = child->nextSibling()) {
-        if (child->compositingState() == NotComposited) {
+        if (child->compositingState() == NotComposited || child->compositingState() == HasOwnBackingButPaintsIntoAncestor) {
             m_hasNonCompositedChild = true;
             return;
         }