Height of fixed height cell is not proper when cell's row is under row spanning cell.

Source/core/rendering/RenderTableSection.h

Index: Source/core/rendering/RenderTableSection.h
diff --git a/Source/core/rendering/RenderTableSection.h b/Source/core/rendering/RenderTableSection.h
index 41c2359fa9400734224f7a3ab19a40c338b7febf..c2ceb1fbc6bf7573827fefb282cf0b74a4426e52 100644
--- a/Source/core/rendering/RenderTableSection.h
+++ b/Source/core/rendering/RenderTableSection.h
@@ -126,6 +126,18 @@ public:
         Length logicalHeight;
     };
 
+    struct SpanningRowsHeight {
+        SpanningRowsHeight()
+            : totalRowsHeight(0)
+            , expectedTotalRowsHeight(0)
+        {
+        }
+
+        Vector<int> rowHeight;
+        int totalRowsHeight;
+        int expectedTotalRowsHeight;
+    };
+
     const BorderValue& borderAdjoiningTableStart() const
     {
         if (hasSameDirectionAs(table()))
@@ -232,6 +244,10 @@ private:
 
     void ensureRows(unsigned);
 
+    void calcRowsHeightInRowSpan(RenderTableCell*, struct SpanningRowsHeight&);
+    void distributeExtraRowSpanHeightToPrecentRows(RenderTableCell*, int, int, int&);
+    void distributeExtraRowSpanHeightToAutoRows(RenderTableCell*, int, int&, Vector<int>&);
+    void distributeExtraRowSpanHeightToRemainingRows(RenderTableCell*, int, int&, Vector<int>&);
     void distributeRowSpanHeightToRows(SpanningRenderTableCells& rowSpanCells);
 
     void distributeExtraLogicalHeightToPercentRows(int& extraLogicalHeight, int totalPercent);