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

third_party/WebKit/Source/core/css/CSSPrimitiveValueMappings.h

 /*
  * Copyright (C) 2007 Alexey Proskuryakov <ap@nypop.com>.
  * Copyright (C) 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  * Copyright (C) 2009 Jeff Schiller <codedread@gmail.com>
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ skipping 1175 matching lines @@
       break;
     case EDisplay::InlineFlex:
       m_valueID = CSSValueInlineFlex;
       break;
     case EDisplay::Grid:
       m_valueID = CSSValueGrid;
       break;
     case EDisplay::InlineGrid:
       m_valueID = CSSValueInlineGrid;
       break;
+    case EDisplay::Contents:
+      m_valueID = CSSValueContents;
+      break;
     case EDisplay::None:
       m_valueID = CSSValueNone;
       break;
   }
 }
 
 template <>
 inline EDisplay CSSIdentifierValue::convertTo() const {
   if (m_valueID == CSSValueNone)
     return EDisplay::None;
@@ skipping 3341 matching lines @@
     default:
       break;
   }
   ASSERT_NOT_REACHED();
   return ContainsNone;
 }
 
 }  // namespace blink
 
 #endif