Implement parseShorthand API for shorthand properties, "overflow", "font" and "font-variant"

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

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/css/parser/CSSPropertyParserHelpers.h"
 
 #include "core/StylePropertyShorthand.h"
 #include "core/css/CSSCalculationValue.h"
 #include "core/css/CSSColorValue.h"
 #include "core/css/CSSCrossfadeValue.h"
@@ skipping 1443 matching lines @@
 // https://drafts.csswg.org/css-shapes-1/#typedef-shape-box
 CSSIdentifierValue* ConsumeShapeBox(CSSParserTokenRange& range) {
   return ConsumeIdent<CSSValueContentBox, CSSValuePaddingBox, CSSValueBorderBox,
                       CSSValueMarginBox>(range);
 }
 
 void AddProperty(CSSPropertyID resolved_property,
                  CSSPropertyID current_shorthand,
                  const CSSValue& value,
                  bool important,
-                 bool implicit,
+                 IsImplicitProperty implicit,
                  HeapVector<CSSProperty, 256>& properties) {
   DCHECK(!isPropertyAlias(resolved_property));
+  DCHECK(implicit == IsImplicitProperty::kNotImplicit ||
+         implicit == IsImplicitProperty::kImplicit);
 
   int shorthand_index = 0;
   bool set_from_shorthand = false;
 
   if (current_shorthand) {
     Vector<StylePropertyShorthand, 4> shorthands;
     getMatchingShorthandsForLonghand(resolved_property, &shorthands);
     set_from_shorthand = true;
     if (shorthands.size() > 1) {
       shorthand_index =
           indexOfShorthandForLonghand(current_shorthand, shorthands);
     }
   }
 
   properties.push_back(CSSProperty(resolved_property, value, important,
                                    set_from_shorthand, shorthand_index,
-                                   implicit));
+                                   implicit == IsImplicitProperty::kImplicit));
 }
 
 }  // namespace CSSPropertyParserHelpers
 
 }  // namespace blink