Fix table cell background painting

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

Index: third_party/WebKit/Source/core/layout/LayoutTableRow.h
diff --git a/third_party/WebKit/Source/core/layout/LayoutTableRow.h b/third_party/WebKit/Source/core/layout/LayoutTableRow.h
index d167a9a147d180d173fd90805e3fa92875209d60..4c99dcd4227f8c62f55e9f6fafd3bbf2fe4a3650 100644
--- a/third_party/WebKit/Source/core/layout/LayoutTableRow.h
+++ b/third_party/WebKit/Source/core/layout/LayoutTableRow.h
@@ -132,6 +132,9 @@ public:
     bool foregroundIsKnownToBeOpaqueInRect(const LayoutRect&, unsigned) const override { return false; }
     bool backgroundIsKnownToBeOpaqueInRect(const LayoutRect&) const override { return false; }
 
+    // Returns section-relative position.
+    LayoutRect positionByCellSpan() const;

[Xianzhu, 2016/03/28 00:44:42]

Please add documentation for this method. I can't guess what this function does
from its name. Perhaps you should also give it a better name.

[atotic1, 2016/03/29 17:05:16]

I've renamed positionByCellSpan to "positionForBackgroundDrawing"

+
 private:
     LayoutObjectChildList* virtualChildren() override { return children(); }
     const LayoutObjectChildList* virtualChildren() const override { return children(); }