Check DisplayItemCient aliveness in cached subsequences

third_party/WebKit/Source/core/paint/PaintLayer.h

Index: third_party/WebKit/Source/core/paint/PaintLayer.h
diff --git a/third_party/WebKit/Source/core/paint/PaintLayer.h b/third_party/WebKit/Source/core/paint/PaintLayer.h
index b36cad216a745eb33715f2ff5a09d2a3a75b6588..90968fcb7b49308b1642b0eaadcba7c66e47800e 100644
--- a/third_party/WebKit/Source/core/paint/PaintLayer.h
+++ b/third_party/WebKit/Source/core/paint/PaintLayer.h
@@ -705,6 +705,10 @@ public:
     bool update3DTransformedDescendantStatus();
     bool has3DTransformedDescendant() const { DCHECK(!m_3DTransformedDescendantStatusDirty); return m_has3DTransformedDescendant; }
 
+#if CHECK_DISPLAY_ITEM_CLIENT_ALIVENESS
+    void endShouldKeepAliveAllClientsRecursive();
+#endif
+
 private:
     // Bounding box in the coordinates of this layer.
     LayoutRect logicalBoundingBox() const;