Add parsing support for display: contents, and minimum behavior similar to display: none

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

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights
  * reserved.
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  *
@@ skipping 479 matching lines @@
   TableColumnGroup,
   TableColumn,
   TableCell,
   TableCaption,
   Box,
   InlineBox,
   Flex,
   InlineFlex,
   Grid,
   InlineGrid,
+  Contents,
   None
 };
 
 enum EInsideLink { NotInsideLink, InsideUnvisitedLink, InsideVisitedLink };
 
 enum EPointerEvents {
   PE_NONE,
   PE_AUTO,
   PE_STROKE,
   PE_FILL,
@@ skipping 207 matching lines @@
   ScrollSnapTypeNone,
   ScrollSnapTypeMandatory,
   ScrollSnapTypeProximity
 };
 
 enum AutoRepeatType { NoAutoRepeat, AutoFill, AutoFit };
 
 }  // namespace blink
 
 #endif  // ComputedStyleConstants_h