Treat zero-width collapsed borders as invisible

third_party/WebKit/Source/core/style/ComputedStyleConstants.h

Index: third_party/WebKit/Source/core/style/ComputedStyleConstants.h
diff --git a/third_party/WebKit/Source/core/style/ComputedStyleConstants.h b/third_party/WebKit/Source/core/style/ComputedStyleConstants.h
index 1b89f9e062e028c1ec1ca9a73c5dcefb91041479..dc90e99c5f6306797074153bc00c54f648a2f395 100644
--- a/third_party/WebKit/Source/core/style/ComputedStyleConstants.h
+++ b/third_party/WebKit/Source/core/style/ComputedStyleConstants.h
@@ -106,16 +106,6 @@ enum EBorderStyle {
   kBorderStyleDouble
 };
 
-enum EBorderPrecedence {
-  kBorderPrecedenceOff,
-  kBorderPrecedenceTable,
-  kBorderPrecedenceColumnGroup,
-  kBorderPrecedenceColumn,
-  kBorderPrecedenceRowGroup,
-  kBorderPrecedenceRow,
-  kBorderPrecedenceCell
-};
-
 enum OutlineIsAuto { kOutlineIsAutoOff = 0, kOutlineIsAutoOn };
 
 enum EMarginCollapse {