Add CSS support for text-decoration-skip

third_party/WebKit/Source/core/css/resolver/StyleResolver.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc.
  * All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
@@ skipping 1341 matching lines @@
     case CSSPropertyWhiteSpace:
     // FIXME: 'text-decoration' shorthand to be handled when available.
     // See https://chromiumcodereview.appspot.com/19516002 for details.
     case CSSPropertyTextDecoration:
     case CSSPropertyTextShadow:
     case CSSPropertyBorderStyle:
       return true;
     case CSSPropertyTextDecorationLine:
     case CSSPropertyTextDecorationStyle:
     case CSSPropertyTextDecorationColor:
+    case CSSPropertyTextDecorationSkip:
       return RuntimeEnabledFeatures::css3TextDecorationsEnabled();
     default:
       break;
   }
   return false;
 }
 
 static inline bool isValidFirstLetterStyleProperty(CSSPropertyID id) {
   switch (id) {
     // Valid ::first-letter properties listed in spec:
@@ skipping 89 matching lines @@
     case CSSPropertyWebkitMarginStart:
     case CSSPropertyWebkitMarginTopCollapse:
     case CSSPropertyWordSpacing:
       return true;
     case CSSPropertyTextDecoration:
       ASSERT(!RuntimeEnabledFeatures::css3TextDecorationsEnabled());
       return true;
     case CSSPropertyTextDecorationColor:
     case CSSPropertyTextDecorationLine:
     case CSSPropertyTextDecorationStyle:
+    case CSSPropertyTextDecorationSkip:
       ASSERT(RuntimeEnabledFeatures::css3TextDecorationsEnabled());
       return true;
 
     // text-shadow added in text decoration spec:
     // http://www.w3.org/TR/css-text-decor-3/#text-shadow-property
     case CSSPropertyTextShadow:
     // box-shadox added in CSS3 backgrounds spec:
     // http://www.w3.org/TR/css3-background/#placement
     case CSSPropertyBoxShadow:
     // Properties that we currently support outside of spec.
@@ skipping 463 matching lines @@
   visitor->trace(m_siblingRuleSet);
   visitor->trace(m_uncommonAttributeRuleSet);
   visitor->trace(m_watchedSelectorsRules);
   visitor->trace(m_treeBoundaryCrossingScopes);
   visitor->trace(m_styleSharingLists);
   visitor->trace(m_pendingStyleSheets);
   visitor->trace(m_document);
 }
 
 }  // namespace blink