[Variables] Enable get/setProperty and similar APIs from the CSSOM

third_party/WebKit/Source/core/css/parser/CSSParser.h

 // Copyright 2014 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.
 
 #ifndef CSSParser_h
 #define CSSParser_h
 
 #include "core/CSSPropertyNames.h"
 #include "core/CoreExport.h"
 #include "core/css/CSSValue.h"
@@ skipping 17 matching lines @@
     STATIC_ONLY(CSSParser);
 public:
     // As well as regular rules, allows @import and @namespace but not @charset
     static PassRefPtrWillBeRawPtr<StyleRuleBase> parseRule(const CSSParserContext&, StyleSheetContents*, const String&);
     static void parseSheet(const CSSParserContext&, StyleSheetContents*, const String&);
     static void parseSelector(const CSSParserContext&, const String&, CSSSelectorList&);
     static bool parseDeclarationList(const CSSParserContext&, MutableStylePropertySet*, const String&);
     // Returns whether anything was changed.
     static bool parseValue(MutableStylePropertySet*, CSSPropertyID unresolvedProperty, const String&, bool important, StyleSheetContents*);
 
+    static bool parseValueForCustomProperty(MutableStylePropertySet*, const AtomicString& propertyName, const String& value, bool important, StyleSheetContents*);
+
     // This is for non-shorthands only
     static PassRefPtrWillBeRawPtr<CSSValue> parseSingleValue(CSSPropertyID, const String&, const CSSParserContext& = strictCSSParserContext());
 
     static PassRefPtrWillBeRawPtr<CSSValue> parseFontFaceDescriptor(CSSPropertyID, const String&, const CSSParserContext&);
 
     static PassRefPtrWillBeRawPtr<ImmutableStylePropertySet> parseInlineStyleDeclaration(const String&, Element*);
 
     static PassOwnPtr<Vector<double>> parseKeyframeKeyList(const String&);
     static PassRefPtrWillBeRawPtr<StyleRuleKeyframe> parseKeyframeRule(const CSSParserContext&, const String&);
 
     static bool parseSupportsCondition(const String&);
 
     // The color will only be changed when string contains a valid CSS color, so callers
     // can set it to a default color and ignore the boolean result.
     static bool parseColor(Color&, const String&, bool strict = false);
     static bool parseSystemColor(Color&, const String&);
 
     static void parseSheetForInspector(const CSSParserContext&, StyleSheetContents*, const String&, CSSParserObserver&);
     static void parseDeclarationListForInspector(const CSSParserContext&, const String&, CSSParserObserver&);
 
 private:
     static bool parseValue(MutableStylePropertySet*, CSSPropertyID unresolvedProperty, const String&, bool important, const CSSParserContext&);
 };
 
 } // namespace blink
 
 #endif // CSSParser_h