Use appropriate background object visual rect for composited table cell backgrounds.

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 41aa838b0072e3f81128caa65bd22652ee9b56c8..e2e44fc22969ec93ce0740d104d87f7424a9e483 100644
--- a/third_party/WebKit/Source/core/layout/LayoutTableCell.h
+++ b/third_party/WebKit/Source/core/layout/LayoutTableCell.h
@@ -317,7 +317,22 @@ class CORE_EXPORT LayoutTableCell final : public LayoutBlockFlow {
     CollapsedBorderValue m_afterBorder;
   };
 
-  bool usesTableAsAdditionalDisplayItemClient() const;
+  class RowBackgroundDisplayItemClient : public DisplayItemClient {
+   public:
+    RowBackgroundDisplayItemClient(const LayoutTableRow&);
+
+    // DisplayItemClient methods.
+    String debugName() const;
+    LayoutRect visualRect() const;
+
+   private:
+    const LayoutTableRow& m_layoutTableRow;
+  };
+
+  bool usesCompositedCellDisplayItemClients() const;
+  const RowBackgroundDisplayItemClient* rowBackgroundDisplayItemClient() const {
+    return m_rowBackgroundDisplayItemClient.get();
+  }
   const CollapsedBorderValues* collapsedBorderValues() const {
     return m_collapsedBorderValues.get();
   }
@@ -330,6 +345,7 @@ class CORE_EXPORT LayoutTableCell final : public LayoutBlockFlow {
   LayoutBox* locationContainer() const override { return section(); }
 
  protected:
+  void ensureIsReadyForPaintInvalidation() override;
   void styleDidChange(StyleDifference, const ComputedStyle* oldStyle) override;
   void computePreferredLogicalWidths() override;
 
@@ -432,6 +448,8 @@ class CORE_EXPORT LayoutTableCell final : public LayoutBlockFlow {
   int m_intrinsicPaddingAfter;
 
   std::unique_ptr<CollapsedBorderValues> m_collapsedBorderValues;
+  std::unique_ptr<RowBackgroundDisplayItemClient>
+      m_rowBackgroundDisplayItemClient;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutTableCell, isTableCell());