Support edge-inclusive intersections in mapToVisibleRectInAncestorSpace

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

Index: third_party/WebKit/Source/core/layout/LayoutTableCell.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutTableCell.cpp b/third_party/WebKit/Source/core/layout/LayoutTableCell.cpp
index bc62253984249840a2d113bff033d44650651947..2ec3e8c545b25caed2a19af6bc8c097c71d281fd 100644
--- a/third_party/WebKit/Source/core/layout/LayoutTableCell.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutTableCell.cpp
@@ -361,14 +361,14 @@ LayoutRect LayoutTableCell::clippedOverflowRectForPaintInvalidation(const Layout
     return r;
 }
 
-void LayoutTableCell::mapToVisibleRectInAncestorSpace(const LayoutBoxModelObject* ancestor, LayoutRect& r, const PaintInvalidationState* paintInvalidationState) const
+bool LayoutTableCell::mapToVisibleRectInAncestorSpace(const LayoutBoxModelObject* ancestor, LayoutRect& r, const PaintInvalidationState* paintInvalidationState, int flags) const
 {
     if (ancestor == this)
-        return;
+        return true;
     r.setY(r.y());
     if ((!paintInvalidationState || !paintInvalidationState->canMapToAncestor(ancestor)) && parent())
         r.moveBy(-parentBox()->location()); // Rows are in the same coordinate space, so don't add their offset in.
-    LayoutBlockFlow::mapToVisibleRectInAncestorSpace(ancestor, r, paintInvalidationState);
+    return LayoutBlockFlow::mapToVisibleRectInAncestorSpace(ancestor, r, paintInvalidationState, flags);
 }
 
 int LayoutTableCell::cellBaselinePosition() const