Fix LayoutBox::topLeftLocation for table rows and table cells

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 fdd374daa6e2b88f4cc809a8ed8396831434ff61..73d34eb35fcc8bceb34c4c9523d5736eaa4aa8a9 100644
--- a/third_party/WebKit/Source/core/layout/LayoutTableCell.h
+++ b/third_party/WebKit/Source/core/layout/LayoutTableCell.h
@@ -288,6 +288,9 @@ class CORE_EXPORT LayoutTableCell final : public LayoutBlockFlow {
 
   void adjustChildDebugRect(LayoutRect&) const override;
 
+  // A table cell's location is relative to its containing section.
+  LayoutBox* locationContainer() const override { return section(); }
+
  protected:
   void styleDidChange(StyleDifference, const ComputedStyle* oldStyle) override;
   void computePreferredLogicalWidths() override;