[css-tables] Set table and cell widths dirty when section border changes

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

Index: third_party/WebKit/Source/core/layout/LayoutTableSection.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutTableSection.cpp b/third_party/WebKit/Source/core/layout/LayoutTableSection.cpp
index 330709877e78c9eb82ea2f75984d83f8f1108141..438d036af5934ea9b94a7ddc63771e871fe00b56 100644
--- a/third_party/WebKit/Source/core/layout/LayoutTableSection.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutTableSection.cpp
@@ -125,6 +125,10 @@ void LayoutTableSection::styleDidChange(StyleDifference diff, const ComputedStyl
     LayoutTable* table = this->table();
     if (table && !table->selfNeedsLayout() && !table->normalChildNeedsLayout() && oldStyle && oldStyle->border() != style()->border())
         table->invalidateCollapsedBorders();
+
+    if (table && oldStyle && diff.needsFullLayout() && needsLayout() && table->collapseBorders() && borderWidthChanged(oldStyle, style())) {
+        markAllCellsNeedsLayoutAndWidthsDirty();
+    }
 }
 
 void LayoutTableSection::willBeRemovedFromTree()
@@ -1216,6 +1220,21 @@ bool LayoutTableSection::recalcChildOverflowAfterStyleChange()
     return childrenOverflowChanged;
 }
 
+void LayoutTableSection::markAllCellsNeedsLayoutAndWidthsDirty()
+{
+    for (unsigned i = 0; i < numRows(); i++) {
+        LayoutTableRow* row = rowLayoutObjectAt(i);
+        if (!row)
+            continue;
+        for (LayoutTableCell* cell = row->firstCell(); cell; cell = cell->nextCell()) {
+            cell->setPreferredLogicalWidthsDirty();
+            // TODO(dgrogan): This is cargo culted from LayoutTableRow::styleDidChange
+            // but I haven't yet come up with a layout test that needs it.
+            cell->setChildNeedsLayout();
+        }
+    }
+}
+
 int LayoutTableSection::calcBlockDirectionOuterBorder(BlockBorderSide side) const
 {
     unsigned totalCols = table()->numEffectiveColumns();