Consider compositing state in row background display item client accessor.

third_party/WebKit/Source/core/layout/LayoutTableCell.h

Index: third_party/WebKit/Source/core/layout/LayoutTableCell.h
diff --git a/third_party/WebKit/Source/core/layout/LayoutTableCell.h b/third_party/WebKit/Source/core/layout/LayoutTableCell.h
index eb63f020e358aaf53c69e7e1e47922ef0e0c8edb..e1d9e970e49c2a94e7acba2a0c5f789209a7d60f 100644
--- a/third_party/WebKit/Source/core/layout/LayoutTableCell.h
+++ b/third_party/WebKit/Source/core/layout/LayoutTableCell.h
@@ -337,7 +337,8 @@ class CORE_EXPORT LayoutTableCell final : public LayoutBlockFlow {
     return m_collapsedBorderValues.get();
   }
   const DisplayItemClient& backgroundDisplayItemClient() const {
-    return m_rowBackgroundDisplayItemClient
+    return (m_rowBackgroundDisplayItemClient &&
+            usesCompositedCellDisplayItemClients())

[Xianzhu, 2017/03/29 00:43:53]

How about keeping this as-is and changing ensureIsReadyForPaintInvalidation() to
clear m_rowBackgroundDisplayItemClient if
!usesCompositedCellDisplayItemClient()?

[Xianzhu, 2017/03/29 00:58:55]

I read your comment in the bug and now think this is good.

                ? static_cast<const DisplayItemClient&>(
                      *m_rowBackgroundDisplayItemClient)
                : *this;