Optimize collapsed border calculation (step 2)

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 38c748d36c548f6ef7561842ad50b51a078de042..cb99e63bf81413ee21a50facf6e043965b33ab8e 100644
--- a/third_party/WebKit/Source/core/layout/LayoutTableRow.h
+++ b/third_party/WebKit/Source/core/layout/LayoutTableRow.h
@@ -175,6 +175,8 @@ class CORE_EXPORT LayoutTableRow final : public LayoutTableBoxComponent {
   void NextSibling() const = delete;
   void PreviousSibling() const = delete;
 
+  void InvalidateCollapsedBordersOfAffectedCells();

[wkorman, 2017/04/27 22:05:36]

Affected by what? Document method, consider rename to either clarify
"AffectedCells" or just remove "OfAffectedCells" since it seems implicit.

+
   // This field should never be read directly. It should be read through
   // rowIndex() above instead. This is to ensure that we never read this
   // value before it is set.