Implements CSSPropertyAPI for the fragmentation element properties.

third_party/WebKit/Source/core/css/parser/CSSPropertyParser.cpp

Index: third_party/WebKit/Source/core/css/parser/CSSPropertyParser.cpp
diff --git a/third_party/WebKit/Source/core/css/parser/CSSPropertyParser.cpp b/third_party/WebKit/Source/core/css/parser/CSSPropertyParser.cpp
index 5356ba494024787c18694d084a9e00b9a0fbf747..b398f6a85974b48814c59adabd60063d486c2587 100644
--- a/third_party/WebKit/Source/core/css/parser/CSSPropertyParser.cpp
+++ b/third_party/WebKit/Source/core/css/parser/CSSPropertyParser.cpp
@@ -1967,10 +1967,6 @@ const CSSValue* CSSPropertyParser::parseSingleValue(
     case CSSPropertyGridRowGap:
       return consumeLengthOrPercent(m_range, m_context->mode(),
                                     ValueRangeNonNegative);
-    case CSSPropertyWebkitBoxOrdinalGroup:
-    case CSSPropertyOrphans:
-    case CSSPropertyWidows:
-      return consumePositiveInteger(m_range);
     case CSSPropertyColor:
     case CSSPropertyBackgroundColor:
       return consumeColor(m_range, m_context->mode(), inQuirksMode());