Bit-mask incorrectly removed first-line pseudo bit.

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 7cfc428bafa07e0b2b4043ee0f3a013f13cd560c..ffb0b1d7800358d2b5250c6146998a60833ecfbb 100644
--- a/third_party/WebKit/Source/core/style/ComputedStyleConstants.h
+++ b/third_party/WebKit/Source/core/style/ComputedStyleConstants.h
@@ -82,11 +82,9 @@ enum PseudoId {
   AfterLastInternalPseudoId,
   FirstPublicPseudoId = PseudoIdFirstLine,
   FirstInternalPseudoId = PseudoIdScrollbarThumb,
-  PublicPseudoIdMask =
-      ((1 << FirstInternalPseudoId) - 1) & ~((1 << FirstPublicPseudoId) - 1),
-  ElementPseudoIdMask = (1 << (PseudoIdBefore - 1)) |
-                        (1 << (PseudoIdAfter - 1)) |
-                        (1 << (PseudoIdBackdrop - 1))
+  ElementPseudoIdMask = (1 << (PseudoIdBefore - FirstPublicPseudoId)) |
+                        (1 << (PseudoIdAfter - FirstPublicPseudoId)) |
+                        (1 << (PseudoIdBackdrop - FirstPublicPseudoId))
 };
 
 enum ColumnFill { ColumnFillBalance, ColumnFillAuto };