Optimize collapsed border calculation (step 2)

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

Index: third_party/WebKit/Source/core/layout/LayoutTableCol.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutTableCol.cpp b/third_party/WebKit/Source/core/layout/LayoutTableCol.cpp
index 36ce08cb9b7188d09b9ff9fccdd0cbfae1b9d1ee..0b9dc04f761ee42f7ee913e045c07d4a2ef8f729 100644
--- a/third_party/WebKit/Source/core/layout/LayoutTableCol.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutTableCol.cpp
@@ -55,8 +55,9 @@ void LayoutTableCol::StyleDidChange(StyleDifference diff,
   if (!table)
     return;
 
-  LayoutTableBoxComponent::InvalidateCollapsedBordersOnStyleChange(
-      *this, *table, diff, *old_style);
+  if (LayoutTableBoxComponent::NeedsInvalidateCollapsedBordersOnStyleChange(
+          *this, *table, diff, *old_style))
+    table->SetNeedsInvalidateCollapsedBordersForAllCells();
 
   if ((old_style->LogicalWidth() != Style()->LogicalWidth()) ||
       LayoutTableBoxComponent::DoCellsHaveDirtyWidth(*this, *table, diff,