Disentangle repaint-after-compositing from updateLayerPositionsAfterLayout

Source/core/rendering/PaintInvalidationState.h

Index: Source/core/rendering/PaintInvalidationState.h
diff --git a/Source/core/rendering/PaintInvalidationState.h b/Source/core/rendering/PaintInvalidationState.h
index cec492d1af559fdf9fceba1d6f53782836f4704f..31d69ededa81bbf244903f9b97e2af52e0e3351c 100644
--- a/Source/core/rendering/PaintInvalidationState.h
+++ b/Source/core/rendering/PaintInvalidationState.h
@@ -31,6 +31,9 @@ public:
     bool cachedOffsetsEnabled() const { return m_cachedOffsetsEnabled; }
     bool isClipped() const { return m_clipped; }
 
+    bool forceCheckForPaintInvalidation() const { return m_forceCheckForPaintInvalidation; }
+    void setForceCheckForPaintInvalidation() { m_forceCheckForPaintInvalidation = true; }
+
     const RenderLayerModelObject& paintInvalidationContainer() const { return m_paintInvalidationContainer; }
     RenderObject& renderer() const { return m_renderer; }
 
@@ -45,6 +48,7 @@ private:
 
     bool m_clipped;
     mutable bool m_cachedOffsetsEnabled;
+    bool m_forceCheckForPaintInvalidation;
 
     LayoutRect m_clipRect;