TopBorderEdge    1410 Source/core/rendering/RenderBoxModelObject.cpp     AllBorderEdges = TopBorderEdge | BottomBorderEdge | LeftBorderEdge | RightBorderEdge
TopBorderEdge    1425 Source/core/rendering/RenderBoxModelObject.cpp     return (flags & (TopBorderEdge | RightBorderEdge)) == (TopBorderEdge | RightBorderEdge)
TopBorderEdge    1428 Source/core/rendering/RenderBoxModelObject.cpp         || (flags & (LeftBorderEdge | TopBorderEdge)) == (LeftBorderEdge | TopBorderEdge);